University of Sao Paulo School of Medicine
Brazil
National Institute of Medical Science and Nutrition Salvador Zubira
Mexico
University City Hospital “Zvezdara”
Serbia
University of Miami Miller School of Medicine
USA
Saiseikai Niigata Daini Hospital
Japan
Istanbul Medipol University
Turkey
China Medical University
China
University of Iowa
University of Nicosia
Cyprus
University of Bologna
Italy
University of Catania
European School of Laparoscopic Surgery
Belgium
SUNY Downstate Health Sciences University
The Ohio State University Wexner Medical Center
Gastro Florida / Advanced Gastro and Liver Care
Taksim Education and Research Hospital
Government Medical College
India