1. Department of Visceral, Vascular, and Endocrine Surgery; University Hospital of Martin Luther University; Halle (Saale) Germany
2. Division of Thyroid and Parathyroid Surgery; Harvard Medical School; Boston Massachusetts U.S.A.
3. Department of Human Pathology in Adulthood and Childhood “G. Barresi”; University Hospital “G. Martino,” University of Messina; Messina Italy
4. Department of Endocrine Surgery, Third Chair of General Surgery; Jagiellonian University Medical College, Faculty of Medicine; Kraków Poland
5. Department of Otolaryngology-Head and Neck Surgery; Kaohsiung Medical University; Kaohsiung Taiwan
6. Endocrine Surgery Section, Clinic of General, Visceral and Transplantation Surgery; University Medical Center; Mainz Germany
7. Department of General Surgery, Sisli Hamidiye Etfal Medical Practice and Research Center; University of Health Sciences; Istanbul Turkey
8. Department of General Surgery; Ege University; Izmir Turkey
9. Department of General Surgery; Trakya University; Edirne Turkey
10. Department of General Surgery; Cerrahpasa Medical Faculty; Istanbul Turkey
11. Department of Endocrine Surgery; Catholic Hospital; Mainz Germany
12. Department of General, Visceral, and Transplantation Surgery, Section of Endocrine Surgery; University of Duisburg-Essen; Essen Germany