1. Department of General Surgery, Colţea Clinical Hospital, Bucharest, Romania
2. Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
3. Department of Plastic and Reconstructive Microsurgery, Military Hospital Dr Carol Davila, Bucharest, Romania
4. Department of Gastroenterology, Fundeni Clinical Institute, Bucharest, Romania
5. Department of General Surgery, “St. John” Emergency Clinical Hospital, Bucharest, Romania