St. Joseph-Krankenhaus Berlin, Berlin, Germany
Universitaire Ziekenhuitzen, Leuven, Belgium
Hôpital Huriez, Lille, France
Hôpital Paul Brousse, Villejuif, France
Advanced Dialysis Center, Lanham, Maryland, United States
Prince of Wales Hospital Chinese University of Hong Kong, Sha Tin, N.t., Hong Kong
Kyungpook National University Hospital, Chung-Gu, Deagu, Korea, Republic of
Yeungnam University Medical Center, Nam-gu, Deagu, Korea, Republic of
Westmead Hospital, Sydney, New South Wales, Australia
Gold Coast Hospital, South Port, Australia
University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
University of Missouri-Columbia, Columbia, Missouri, United States
Colon & Rectal Surgery Associates, St. Paul, Minnesota, United States
Lahey Clinic, Burlington, Massachusetts, United States
Klinika Chirurgii Ogolnej Onkologicznej i Klatiki Piersiowej CSK WAM, Warsaw, Poland
Copenhagen University Hospital, Rigshospitalet Department of Gastroenterologic Surgery, Copenhagen, Denmark
Söder Sjukhuset, Department of Surgery, Stockholm, Sweden
Bejing No.3 Hospital, Beijing, China
Renji Hospital, Shanghai, Shanghai, China