1. Department of Visceral Surgery, ‘Dan Setlacec’ Center of Gastrointestinal Diseases and Liver Transplantation, ‘Fundeni’ Clinical Institute, 022328 Bucharest, Romania
2. Department of Surgery, ‘Ponderas’ Academic Hospital, 021188 Bucharest, Romania
3. Department of Obstetrics and Gynecology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
4. Department of Thoracic Surgery, ‘Marius Nasta’ National Institute of Pneumology, 050159 Bucharest, Romania