1. Department of Endocrinology; 424 General Military Hospital; Thessaloniki Greece
2. Department of Medicine; Aristotle University of Thessaloniki; Ippokration Hospital Thessaloniki Greece
3. Department of Endocrinology and Diabetes; 251 Hellenic Air Force & VA General Hospital; Athens Greece
4. Center for Bone Diseases; Lausanne University Hospital; Lausanne Switzerland
5. Endo Center; Limassol; Cyprus