1. EA4340, UVSQ, Boulogne-Billancourt, France;
2. Service de Pathologie, CHU Ambroise Paré, Boulogne-Billancourt, France;
3. Service de Gastroenterologie, Hopital St Louis, APHP, Paris, France;
4. Service de Hématologie-Immunologie, CHU Ambroise Paré, Boulogne-Billancourt, France