1 Ozel Saglik Hospital, Centre for Endocrine Surgery, Izmir, Turkey.
2 Department of General Surgery, Koc University School of Medicine, Istanbul, Turkey.
3 Department of Surgery (CVMC), Unit of Endocrine and Metabolic Surgery, University of Lorraine, CHU Nancy-Hospital Brabois Adultes, Nancy, France.
4 Department of General and Endocrine Surgery, Onze-Lieve-Vrouw (OLV) Hospital, Aalst, Belgium.
5 Department of General, Visceral and Transplantation Surgery, Section of Endocrine Surgery, University Medicine Mainz, Johannes-Gutenberg University, Mainz, Germany.
6 Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, UOC Chirurgia Endocrina e Metabolica, Centro di Ricerca in Chirurgia Endocrina e dell'Obesità, Rome, Italy.
7 Department of Surgery, Oncology and Gastroenterology, Endocrine Surgery Unit, University of Padova, Padua, Italy.
8 Department of Head and Skin, University Hospital Ghent, Ghent, Belgium.
9 Department of General Surgery, AZ Damiaan, Ostend, Belgium.
10 Clinic for General, Visceral and Transplantation Surgery, Section of Endocrine Surgery, University Medical Centre Mainz, Mainz, Germany.
11 Department of General Surgery, University of Granada, Hospital Universitario Virgen de las Nieves, Granada, Spain.