1. University of Las Palmas de Gran CanariaInvestigation Group on Osteoporosis and Bone Mineral MetabolismHospital University InsularLas Palmas de Gran Canaria Canary Islands Spain
2. Internal Medicine Service Hospital General University Elche Elche Alicante Spain
3. Endocrinology Section Hospital University Insular Las Palmas de Gran Canaria Spain
4. Mathematics Department University of Las Palmas de Gran Canaria Las Palmas de Gran Canaria Spain
5. Internal Medicine Hospital University San Cecilio Granada Spain
6. Rheumatology Service Hospital University Salamanca Salamanca Spain
7. Internal Medicine Hospital University Río Hortega Valladolid Spain
8. Internal Medicine Service Hospital University Fundación Jiménez Díaz Madrid Spain
9. Internal Medicine Service Hospital University Central Asturias Oviedo Spain
10. Endocrinology Service Hospital University 12 de Octubre Madrid Spain
11. Internal Medicine Service Hospital General University Albacete Albacete Spain
12. Internal Medicine Service Hospital Universitario Marqués de Valdecilla Santander Spain
13. Orthopaedic Surgery Hospital Alto Deba Guipúzcoa Spain
14. Orthopaedic Surgery Department University Hospital of Santiago de Compostela La Coruña Spain
15. Internal Medicine Service Hospital Virgen de la Luz Cuenca Spain