1. Department of General Surgery, Trabzon Of State Hospital, Trabzon, Turkey.
2. Department of General Surgery, Gaziantep Nizip State Hospital, Gaziantep, Turkey.
3. Department of General Surgery, Adiyaman Golbasi State Hospital, Adiyaman, Turkey.
4. Department of General Surgery, Bakirköy Dr. Sadi Konuk Research and Training Hospital, Istanbul, Turkey.