The First Affiliated Hospital of the Air Force Medical University, Xi'an, Shaanxi, China
Gujranwala Medical College Hospital, Gujranwala, Punjab, Pakistan
University Hospital of Ghent, Ghent, Belgium
Amsterdam University Medical Center, Amsterdam, Noord-Holland, Netherlands
Leiden University Medical Center, Leiden, Zuid-Holland, Netherlands
Soonchunhyang University Bucheon Hospital, Bucheon, Gyeonggi-do, Korea, Republic of
Carlos Robles-Medranda, Guayaquil, Guayas, Ecuador
Asian Institute of Gastroenterology, Hyderabad, Telangana, India
National Institutes of Health Clinical Center, Bethesda, Maryland, United States
Karolinska University Hospital Huddinge, Stockholm, Sweden
Baylor Saint Luke's Medical Center, Houston, Texas, United States
Advanced Endoscopy Research, Robert Wood Johnson Medical School Rutgers University, New Brunswick, New Jersey, United States
Houston Methodist Hospital, Houston, Texas, United States
Ajou University Hospital, Suwon, Gyeonggido, Korea, Republic of