1. Department of General, Visceral, and Vascular 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 for Endocrine Surgery; University of Insubria; Varese Italy
4. Department of Endocrine Surgery, 3rd Chair of General Surgery; Jagiellonian University; Krakow Poland
5. Department of Otolaryngology-Head and Neck Surgery; Kaohsiung Medical University; Kaohsiung City Taiwan
6. Thoracic and Endocrine Surgery; University Hospitals of Geneva; Geneva Switzerland
7. Department of Endocrine Surgery; Central Clinic of Athens; Athens Greece
8. Department of Surgery; Haukeland University Hospital; Bergen Norway
9. Endocrine Surgery Section, Clinic of General, Visceral, and Transplantation Surgery; University Medical Center; Mainz Germany
10. Department of Surgery; Lund University Hospital; Lund Sweden
11. Department of General Surgery; University of Catanzaro; Catanzaro Italy
12. Department of Surgery; University Hospital “Virgen Macarena”; Seville Spain
13. Department of Endocrine Surgery; University Hospital of Poitiers; Poitiers France
14. Department of Surgery; Kuma Hospital; Kobe Japan
15. Department of General, Gastroenterological and Endocrine Surgery; Medical University Wrocław; Wrocław Poland
16. Department of Otorhinolaryngology-Head and Neck Surgery; University of Brescia; Brescia Italy
17. Department of General, Viszeral and Thoracic Surgery; Bundeswehr Hospital; Berlin Germany
18. Thyroid and Parathyroid Surgery Unit; Istituto Nazionale per lo Studio e la Cura dei Tumori; Fondazione G. Pascale Naples Italy
19. Department of General Surgery; “Principe de Asturias” University Hospital; Madrid Spain
20. Department of General and Endocrine Surgery; OLV Clinic Aalst; Aalst Belgium