1. Clinic of General Surgery, Mehmet Akif İnan Training and Research Hospital, Şanlıurfa, Turkey

2. Clinic of General Surgery, Division of Surgical Oncology, Numune Training and Research Hospital, Ankara, Turkey

3. Department of General Surgery, Turgut Özal University School of Medicine, Ankara, Turkey

4. Clinic of General Surgery, Ankara Umut Hospital, Ankara, Turkey