<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0016-3503</journal-id>
<journal-title><![CDATA[Gen]]></journal-title>
<abbrev-journal-title><![CDATA[Gen]]></abbrev-journal-title>
<issn>0016-3503</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Venezolana de Gastroentereología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-35032009000200007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Screening para enfermedad celiaca en familiares de primer grado de niños celiacos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Landaeta]]></surname>
<given-names><![CDATA[Neyda]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[Magaly]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernandez]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Padrón]]></surname>
<given-names><![CDATA[Diana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arredondo]]></surname>
<given-names><![CDATA[Claudio]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,IVIC Laboratorio de Hemostasia y Genética Vascular ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2009</year>
</pub-date>
<volume>63</volume>
<numero>2</numero>
<fpage>108</fpage>
<lpage>110</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_arttext&amp;pid=S0016-35032009000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_abstract&amp;pid=S0016-35032009000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_pdf&amp;pid=S0016-35032009000200007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La enfermedad Celiaca es una enteropatía autoinmune inducida por el gluten de la dieta, con afectación variable del epitelio intestinal y amplio espectro clínico. Objetivo: Determinar la presencia de marcadores serológicos para Enfermedad Celiaca en familiares de primer grado de niños Celiacos y detección de casos nuevos en esta población de riesgo. Materiales y Métodos: Determinación serológica de Antitransglutaminasa IgA y Antiendomisio IgA (EMA), búsqueda de síntomas gastrointestinales, y estudios histológicos de intestino delgado en familiares de primer grado de 7 niños conocidos con Enfermedad Celiaca. Resultados: Se estudiaron 16 familiares entre 15 a 51 años con una edad media de 33,7 años. 6/16 (37,5%) resultaron positivos para Antitransglutaminasa IgA y 9/16 (56,25%) fueron positivos para EMA. De los familiares que presentaron serologías positivas 4/10 (40%), tenían síntomas que pudieran atribuirse a la presencia de Enfermedad Celiaca tales como dolor abdominal, distensión abdominal y diarrea asociada a la ingestión trigo y 6/10 (60%) eran asintomáticos al momento del estudio. Conclusión: Reportamos 10 casos de familiares de primer grado de niños celiacos, con serología positiva para dicha enfermedad. Dado la susceptibilidad de este grupo consideramos y alertamos a la pesquisa de esta entidad en familiares de primer grado de pacientes con Enfermedad celiaca, lo cual esta realizándose rutinariamente en otras latitudes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Celiac disease is an autoimmune enteropathy induced by the gluten from the diet, with variable involvement of intestinal epithelium and broad clinical spectrum. Objective: To determine the presence of serological markers for Celiac Disease in first degree relatives of celiac children. Material and Methods: Serological determinations of Antitransglutaminasa IgA and Antiendomisysium IgA (EMA) were performed in first degree relatives of 7 children with Celiac Disease. Results: We studied 16 families between 15 to 51 years with an average age 33.7 years. 6 / 16 (37.5%) were positive for Antitransglutaminasa IgA and 9 / 16 (56.25%) were positive for EMA. Of the relatives who presented positive screening 4/10 (40%) presented signs or symptoms that could be associated with Celiac Disease, such as: diarrhea, abdominal distension and pain; 6/10 (60%) of patients were asymptomatic. Conclusion: We reported 10 cases of relatives of celiac children with positive serology for the disease. Given the susceptibility of this group we considered and alerted the research of this entity in relatives of patients with celiac disease. Keys Words: First degree relatives, Celiac Disease, Children, Antitrastaminase IgA, Antiendomisysium IgA.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Familiares de 1er grado]]></kwd>
<kwd lng="es"><![CDATA[Enfermedad Celiaca]]></kwd>
<kwd lng="es"><![CDATA[Niños]]></kwd>
<kwd lng="es"><![CDATA[Antitransglutaminasa IgA]]></kwd>
<kwd lng="es"><![CDATA[Antiendomisio IgA]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center" style="word-spacing: 0; line-height: 100%"><span style="font-weight: 700"><font face="Verdana" size="3">Screening  para enfermedad celiaca en familiares de primer grado de niños celiacos.</font></span></p>     <p align="center" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Dres. Landaeta Neyda*, Rodríguez  Magaly**, Ana Fernandez***, Padrón Diana***, Claudio Arredondo****.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">*Residente de Postgrado de  Gastroenterología Pediátrica. <a href="mailto:neydaalejandra@hotmail.com"> neydaalejandra@hotmail.com</a>.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">**Médico Adjunto al Servicio de  Gastroenterología Pediátrica.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">***Laboratorio de Hemostasia y  Genética Vascular IVIC.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">****Gastroenterólogo Pediatra.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2"><b>RESUMEN</b></font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">La enfermedad Celiaca es una  enteropatía autoinmune inducida por el gluten de la dieta, con afectación  variable del epitelio intestinal y amplio espectro clínico. Objetivo: Determinar  la presencia de marcadores serológicos para Enfermedad Celiaca en familiares de  primer grado de niños Celiacos y detección de casos nuevos en esta población de  riesgo. Materiales y Métodos: Determinación serológica de Antitransglutaminasa  IgA y Antiendomisio IgA (EMA), búsqueda de síntomas gastrointestinales, y  estudios histológicos de intestino delgado en familiares de primer grado de 7  niños conocidos con Enfermedad Celiaca. Resultados: Se estudiaron 16 familiares  entre 15 a 51 años con una edad media de 33,7 años. 6/16 (37,5%) resultaron  positivos para Antitransglutaminasa IgA y 9/16 (56,25%) fueron positivos para  EMA. De los familiares que presentaron serologías positivas 4/10 (40%), tenían  síntomas que pudieran atribuirse a la presencia de Enfermedad Celiaca tales como  dolor abdominal, distensión abdominal y diarrea asociada a la ingestión trigo y  6/10 (60%) eran asintomáticos al momento del estudio. Conclusión: Reportamos 10  casos de familiares de primer grado de niños celiacos, con serología positiva  para dicha enfermedad. Dado la susceptibilidad de este grupo consideramos y  alertamos a la pesquisa de esta entidad en familiares de primer grado de  pacientes con Enfermedad celiaca, lo cual esta realizándose rutinariamente en  otras latitudes.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2"><b>Palabras claves:</b> Familiares de  1er grado, Enfermedad Celiaca, Niños, Antitransglutaminasa IgA, Antiendomisio  IgA.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><b><font face="Verdana" size="2">SUMMARY</font></b></p>     ]]></body>
<body><![CDATA[<p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Celiac disease is an autoimmune  enteropathy induced by the gluten from the diet, with variable involvement of  intestinal epithelium and broad clinical spectrum. Objective: To determine the  presence of serological markers for Celiac Disease in first degree relatives of  celiac children. Material and Methods: Serological determinations of  Antitransglutaminasa IgA and Antiendomisysium IgA (EMA) were performed in first  degree relatives of 7 children with Celiac Disease. Results: We studied 16  families between 15 to 51 years with an average age 33.7 years. 6 / 16 (37.5%)  were positive for Antitransglutaminasa IgA and 9 / 16 (56.25%) were positive for  EMA. Of the relatives who presented positive screening 4/10 (40%) presented  signs or symptoms that could be associated with Celiac Disease, such as:  diarrhea, abdominal distension and pain; 6/10 (60%) of patients were  asymptomatic. Conclusion: We reported 10 cases of relatives of celiac children  with positive serology for the disease. Given the susceptibility of this group  we considered and alerted the research of this entity in relatives of patients  with celiac disease. Keys Words: First degree relatives, Celiac Disease,  Children, Antitrastaminase IgA, Antiendomisysium IgA.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2"><b>Recibido</b> Sep. 2008. <b>Revisado</b> Nov. 2008. <b>Aceptado</b> Feb. 2009.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2"><b>INTRODUCCIÓN</b></font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">La enfermedad celiaca (EC) es  una entidad en donde convergen factores genéticos y ambientales que dan origen a  una enteropatía autoinmune; la cual ocurre en individuos predispuestos  genéticamente posterior a la ingesta prolongada de gluten dietario, el cual se  encuentra en ciertos cereales como trigo, cebada, y centeno; provocando una  inflamación crónica del intestino delgado, la cual lleva al desarrollo  progresivo de atrofia de las vellosidades e hiperplasia de las criptas<sup>(1-5)</sup>.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">La Enfermedad Celiaca es uno de  los padecimientos con base genética más frecuentes; ocurriendo en promedio 1 de  cada 80 a 300 individuos de la población mundial, afectando diferentes grupos  étnicos y etarios, con formas clínicas que van desde asintomáticos a la forma  clásica de la enfermedad<sup>(3,4, 7-14)</sup>.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">En las últimas décadas con el  advenimiento de marcadores serológicos de alta especificidad y sensibilidad,  sumado al aumento a la sospecha de esta entidad por los clínicos; la EC es cada  vez más reconocida, tanto en la población general como en los grupos de riesgo,  tales como: Familiares en primer grado de pacientes Celiacos, pacientes con  Diabetes Mellitus, Síndrome de Down, pacientes con Déficit IgA, etc.<sup>(4,5,8,15-19)</sup>.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Debido a que la EC puede pasar  desapercibida en estos grupos; provocando eventualmente complicaciones  extraintestinales, como: anemia crónica, osteopenia, osteoporosis, infertilidad,  abortos a repetición, depresión, desordenes neurológicos, endocrinopatías, e  incluso se le ha asociado con enfermedades malignas del tracto digestivo tales  como adenocarcinoma primario de intestino delgado, carcinoma de células  escamosas de esófago y linfoma no Hodking<sup>(4,5,8,19-29)</sup>; decidimos  investigar a los familiares de primer grado de aquellos pacientes conocidos  portadores de EC que han sido diagnosticados y seguidos en la consulta del  Servicio de Gastroenterología Pediátrica del Hospital de Niños J.M de los Ríos.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Se investigo la presencia de  dicha enfermedad a través de la determinación de Antitransglutaminasa A, EMA, y  estudio histológico de muestras seriadas de biopsias de intestino delgado.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><b><font face="Verdana" size="2">MATERIALES Y MÉTODOS</font></b></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Se trata de un estudio tipo  prospectivo, experimental, descriptivo y longitudinal; en el cual se  seleccionaron 16 familiares de primer grado de consanguinidad (padres y  hermanos) de pacientes con diagnóstico de EC conocidos y controlados por el  Servicio de Gastroenterología Pediátrica del Hospital de Niños &quot;J.M. de los  Ríos&quot; de Caracas durante el período comprendido entre mayo y diciembre del 2007.</font></p>     ]]></body>
<body><![CDATA[<p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Previa aprobación por la  Subcomisión de ética del hospital, a todos los participantes se les informó de  forma verbal y escrita sobre las características y objetivos planteados en el  proyecto, posteriormente se procedió a la recolección de datos en una ficha  donde se registraron las variables a estudiar: datos epidemiológicos (edad,  sexo, parentesco) y síntomas gastrointestinales tales como diarrea,  estreñimiento, distensión y dolor abdominal, esteatorrea, vómitos, hiporexia,  hemorragias gastrointestinales.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Seguidamente bajo condiciones  de asepsia y en la región anterior del antebrazo, se obtuvo una muestra de  sangre (10 ml), la cual fue centrifugada por un lapso de 20 min. a 2500 rpm  (Centrifuga Sorvall RT 6000B Du Pont TM, EE.UU) para obtener el suero, el que  luego fue almacenado a -70<sup>o</sup>C hasta su procesamiento. La determinación  de niveles de Antitransglutaminasa IgA se realizó por el método de ELISA,  empleándose un método comercial; el cual usa como antígeno de captura la enzima  transglutaminasa tisular recombinante humana (AESKULISA tTG-A, AESKU.  DIAGNOSTICS, Alemania).</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">El suero sobrenadante se  almacenó a 20<sup>o</sup>C hasta su procesamiento en el laboratorio de Trombosis  Experimental ubicado en el Centro de Biofísica y Bioquímica del Instituto  Venezolano de Investigaciones Científicas. La sensibilidad analítica reportada  por el fabricante es de 1,0U/ml, el valor límite reportado por el fabricante  para niveles normales de Antitransglutaminasa IgA es menor de 15 U/ml y la  especificidad y sensibilidad son 95-100% y 98-100%, respectivamente. La  determinación de anticuerpos antiendomisio (EMA), se realizó por  inmunofluorescencia indirecta del cordón umbilical humano donado por una mujer  sana.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Además se realizaron  determinaciones de IgA sérica a la totalidad de los pacientes a través del  método nefelométrico comercial Minemeph TH Human Kit.The Binding site Lid  Birmngahm Reino Unido) cuyos valores de referencia son 0,71 a 3,16 g/l.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">A los familiares de primer  grado con valores positivos de Antitransglutaminasa IgA y EMA, se les programo  endoscopía digestiva alta para la toma de biopsias seriadas de intestino  delgado, con equipo Olympus GIF XP20. Las muestras de tejidos fueron orientadas  en papel de filtro, sumergidas en formalina y enviadas al servicio de Anatomía  Patológica del hospital para su tinción con Hematoxilina- Eosina y posterior  análisis histológico. Se realizó análisis estadístico de los datos mediante  porcentaje, media aritmética.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><b><font face="Verdana" size="2">RESULTADOS</font></b></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">La determinación serológica se  realizó en 16 familiares de primer grado (7 madres, 6 padres y 3 hermanos), con  un rango de edad entre 15 a 51 años y una media de 33,7 años (10 / 6) que  corresponden al 62,5 % y al 37,5 % respectivamente. Presentaron serología  positiva para Antitransglutaminasa IgA 6/16 (37,5%), y 9/16 (56,25%) tenían  positividad para EMA. Los casos 2, 5, 7, 8, 10 ( ver <a href="#tab1">tabla 1</a>),  poseen ambos anticuerpos positivos y en los casos 3,4,6,9 ( ver <a href="#tab1"> tabla 1</a> ) solo posen un anticuerpo positivo. En cuanto a los síntomas  gastrointestinales que pudieran atribuirse a la presencia de EC, en los  familiares que tenían serologías positivas, solo 4/10 de los paciente (40%)  manifestaron padecer síntomas tales como dolor o distensión abdominal y diarrea  asociada a la ingestión trigo y 6/10 (60%) eran asintomáticos (ver <a href="#tab1">tabla 1</a>).</font></p>     <p align="center" style="word-spacing: 0; line-height: 100%"><a name="tab1"> <img border="0" src="/img/fbpe/gen/v63n2/art07tab1.gif" width="565" height="648"></a></p>     
<p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">De los familiares que  reportaron serologías positiva para EMA o Antitrasglutaminasa A solo se obtuvo  material para el estudio histológico en 2/10 ( 20%); los cuales resultaron tener  una gradación de Marsh 0, y ambos tenían clínica gastrointestinal que podría  atribuirse a enfermedad celiaca; pacientes 1 y 5 (ver <a href="#tab1">tabla 1</a>)  , presentando los 2 casos Antitransglutaminasa A y uno de ellos tenía EMA  positiva.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><b><font face="Verdana" size="2">DISCUSIÓN</font></b></p>     ]]></body>
<body><![CDATA[<p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">La prevalencia de la enfermedad  celíaca en los familiares de primer grado de pacientes celíacos oscila, entre 5  a 13%, siendo mayor en los gemelos univitelinos y en los familiares que  comparten los mismos alelos de riesgo (HLA). La presencia de uno o varios  marcadores serológicos positivos en este grupo no siempre se relaciona con la  existencia de una enteropatía, pero si con la posibilidad de formas latentes y  potenciales<sup>(5,8,19,30-32)</sup>.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">De los exámenes serológicos los  anticuerpos Antitransglutaminasa A y el EMA, son habitualmente los más  realizados ya que tienen una sensibilidad de 90% y una especificidad del 95%,  por lo que son de gran utilidad en la selección de pacientes que deberían ser  sometidos a la toma de biopsias del intestino delgado. Sin embargo hay estudios  que demuestran que la relación de los mismos con el grado histológico es  variable y que tienen más utilidad en el seguimiento de la dieta de restricción<sup>(4,5,6,  30,31)</sup>.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">La finalidad de este estudio  fue determinar la presencia de casos nuevos de EC, en un grupo reconocido de  alto riesgo para presentar EC ya que genéticamente pueden compartir los mismos  alelos para la enfermedad. La EC puede aparecer en casi cualquier momento de la  vida, mientras se este expuesto a los antígenos dietarios; y dado que estos  familiares no siguen una dieta sin gluten, realizamos los estudios serológicos  ya citados e indagamos sobre la presencia de síntomas asociados a esta entidad.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Encontramos Antitrasglutaminasa  A positiva en 6 familiares (37,5%) y EMA positiva en 9 (56,25%). Estos  porcentajes son mayores a las series reportadas a nivel internacional que pueden  llegar a 23% para Antitrasglutaminasa IgA<sup>(5,19,33)</sup> no obstante esto  puede ser debido a el tamaño de la muestra, por lo que no pueden hacerse  conclusiones con una data tan pequeña, por otro lado se había programado  realizar endoscopias para el estudio histológico en aquellos cuya serología  resultara positiva, pero debido a diversos inconvenientes solo se pudieron  estudiar 2 familiares.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">De este grupo de familiares que  se les realizo endoscopia digestiva superior y a los cuales aún no han sido  estudiados en su totalidad 6/10 se les tomo muestras para determinación de HLA  (esto pertenece a otro estudio en proceso, donde se estudiaran a los familiares  con marcadores genéticos).</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Actualmente es difícil indicar  dietas de exclusión a individuos que presenten serologías positivas y sean  asintomáticos; con biopsias francamente alteradas o con cambios mínimos, de allí  que se está abogando en estudiar los antígenos de histocompatibilidad en la  investigación de grupos poblacionales de riesgo; lo cual ayudaría a precisar  mejor el espectro de esta enfermedad y poder definir que individuos realmente  padecen o pueden padecer EC<sup>(5,8, 29,33-40)</sup>. Sin embargo son pruebas  costosas y no disponibles en cualquier centro, por lo que la decisión de  diagnosticar un nuevo caso con serología positiva y biopsia negativa ó biopsia  positiva y serología negativa con o sin síntomas, plantea un dilema, de allí que  si son familiares de primer grado en la niñez y/o adolescencia, debe realizarse  un abordaje amplio del caso y seguimiento para vigilar parámetros como velocidad  de crecimiento, presencia o no de anemia, osteopenia y excluir otras causas de  atrofia vellositaria y falsos positivos en la serología.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">Por otro lado los adultos deben  ser informados sobre el espectro clínico de la EC y el riesgo de desarrollar  complicaciones de sus otros hijos (con EC asintomático). A pesar de las  limitaciones del estudio concluimos que debido la susceptibilidad conocida de  este grupo en especial, la pesquisa de esta entidad en familiares de primer  grado de pacientes celiacos debe ser parte de la investigación, al  diagnosticarse certeramente un caso índice o positivo.</font></p>     <p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2"><b>REFERENCIAS BIBLIOGRÁFICA</b></font></p>     <!-- ref --><p align="justify" style="word-spacing: 0; line-height: 100%"><font face="Verdana" size="2">1. Branski D, Troncone R.  Celiac disease: a reappraisal. 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