1. Department of Surgery , General Hospital , Odorheiu Secuiesc , Romania
2. “George Emil Palade” University of Medicine, Pharmacy, Science and Technology , Târgu Mureș , Romania
3. Department of Anesthesiology and Intensive Care , General Hospital , Târgu Secuiesc , Romania
4. 2nd Surgery Department , Mureş County Emergency Clinical Hospital , Târgu Mureș , Romania
5. Department of Cardiology , Cardiovascular Recovery Hospital , Covasna , Romania
6. Department of Surgery , General Hospital , Târgu Secuiesc , Romania