1. Department of Clinic Surgery, Dunarea de Jos University, Galati, Romania
2. Department of Morphological and Functional Sciences, Dunarea de Jos University, Galati, Romania
3. Department of Medical Biostatistics, Carol Davila University, Bucharest, Romania
4. Department of General Surgery, Titu Maiorescu University, Bucharest, Romania
5. Department of General Surgery, Carol Davila University, Bucharest, Romania