Beijing Ditan Hospital, Beijing, China
Beijing Friendship Hospital, Capital Medical University, Beijing, China
Beijing Youan Hospital, Capital Medical University, Beijing, China
Pinnacle Clinical Research, PLLC, San Antonio, Texas, United States
American Research Corporation at the Texas Liver Institute, San Antonio, Texas, United States
Gastro One, Germantown, Tennessee, United States
Hospital Ramón Y Cajal, Madrid, Spain
La Fe Hospital, Valencia, Spain
Hospital Clínic de Barcelona, Barcelona, Spain
Hospital Universitario Donostia, San Sebastian, Spain
Hospital Universitario Virgen De La Arrixaca, Murcia, Spain
Complexo Hospitalario Universitario de Montecelo, Pontevedra, Spain