Service of Gastroenterology,Centro Medico Teknon, 08022 Barcelona, Spain
Digestive Disease Unit, Hospital Quiron, 46010 Valencia, Spain
Centro de Investigacion Biomedica
Service of Gastroenterology, Hospital Universitario La Fe, 46026 Valencia, Spain
Biostatistics, Innovex-Grupo Quintiles Espana, 28033 Madrid, Spain
Medical Department AstraZeneca Farmaceutica, 28033 Madrid, Spain
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