1. Department of Gastroenterology University Hospital of Saint Etienne Saint Etienne France
2. Department of Gastroenterology Lyon Sud HospitalHospices Civils de Lyon Lyon France
3. Department of Immunology CIRI – Centre International de Recherche en Infectiologie Team GIMAP Univ LyonUniversité Claude Bernard Lyon 1InsermU1111CNRSUMR530 Saint‐Etienne France