1. Department of Surgery, ‘Dan Setlacec’ Center of Gastrointestinal Diseases and Liver Transplantation, Fundeni Clinical Institute, 022328 Bucharest, Romania
2. Department of Surgery, Sanador Medical Center, 011038 Bucharest, Romania
3. Department of Internal Medicine, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
4. Department of Urology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
5. Department of Thoracic Surgery, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
6. Department of Anesthesiology, Fundeni Clinical Institute, 022328 Bucharest, Romania
7. Department of Obstetrics and Gynecology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
8. Department of Surgery, ‘Sf. Pantelimon’ Clinical Hospital, 021659 Bucharest, Romania
9. Department of Surgery, ‘Ponderas’ Academic Hospital, 021188 Bucharest, Romania