1. Faculty of Medicine, Carol Davila University of Medicine and Pharmacy Bucharest, 020021 Bucharest, Romania
2. Fourth General Surgery Department, Emergency University Hospital Bucharest, 050098 Bucharest, Romania
3. Faculty of Medicine, University Lucian Blaga Sibiu, 550169 Sibiu, Romania
4. Department of Surgery, Emergency County Hospital Sibiu, 550245 Sibiu, Romania
5. Department of General Surgery, Emergency Clinic Hospital “Sf. Pantelimon” Bucharest, 021659 Bucharest, Romania
6. Faculty of Dental Medicine, Carol Davila University of Medicine and Pharmacy Bucharest, 020021 Bucharest, Romania
7. Department of Internal Medicine, Ilfov Emergency Clinic Hospital Bucharest, 022104 Bucharest, Romania
8. Department of Nursing and Dentistry, Faculty of General Medicine, University Lucian Blaga Sibiu, 550169 Sibiu, Romania
9. Clinical Hospital of Infectious and Tropical Diseases “Dr. Victor Babes”, 030303 Bucharest, Romania
10. Faculty of Medicine, Ovidius University Constanta, 900470 Constanta, Romania
11. General Surgery Department, Emergency County Hospital Constanta, 900591 Constanta, Romania