1. APHP-UPEC Paris12, 51 Av Mal deLattre de Tassigny, Créteil 94010, France
2. Gastroenterology Unit, Albert Chenevier-Henri Mondor Hospital AP-HP, UPEC, Université Paris 12, Paris, France
3. Department of Pathology, Albert Chenevier-Henri Mondor Hospital AP-HP, UPEC, Université Paris 12, Paris, France