1. Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM); Spain
2. Department of Endocrinology and Nutrition; Hospital Universitario Carlos Haya, IBIMA; Malaga Spain
3. Department of Endocrinology and Nutrition; Hospital del Mar; Barcelona Spain
4. Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic de Barcelona; Spain
5. Laboratorio de Bioquímica; Hospital Universitario S. Carlos de Madrid; Spain
6. Department of Endocrinology and Nutrition; Hospital Universitario S. Carlos de Madrid; Spain
7. Department of Medicine and Endocrinology; Hospital Universitario de Valencia; Spain
8. Biomedic Diagnostic Centre; Hospital Clínic de Barcelona; Spain
9. Research Unit, Hospital Universitario Cruces, UPV-EHU; Baracaldo Spain
10. Department of Health; Autonomous Government of Catalonia; Barcelona Spain
11. Department of Endocrinology and Nutrition; Hospital Central de Asturias; Oviedo Spain
12. EAP Raval Sud, Institut Català de la Salut, Red GEDAPS, Primary Care, Unitat de Suport a la Recerca (IDIAP - Fundació Jordi Gol); Barcelona Spain
13. Department of Endocrinology and Nutrition; Hospital Universitario Cruces - UPV-EHU; Baracaldo Spain
14. Diabetes Unit, Hospital Arnau de Vilanova; Valencia Spain
15. Spanish Diabetes Society; Madrid Spain
16. Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC); Madrid Spain
17. Canary Isles Health Service; Tenerife Spain
18. Department of Endocrinology and Nutrition, Hospital Universitario Joan XXIII; Institut d'Investigacions Sanitaries Pere Virgili; Tarragona Spain