1. “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
2. General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
3. Medical Oncology Department, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
4. Surgical Clinic I, Clinical Hospital Dr. I. Cantacuzino Bucharest, 030167 Bucharest, Romania