1. Endocrinology and Nutrition Unit, Hospital General de Segovia, 40003 Segovia, Spain
2. Endocrinology and Nutrition Service, Complejo Hospitalario Universitario de Albacete, 02008 Albacete, Spain
3. Endocrinology and Nutrition Service, Complejo Hospitalario de Burgos, 09006 Burgos, Spain
4. Endocrinology and Nutrition Service, Hospital Clínico San Carlos, 28040 Madrid, Spain
5. Endocrinology and Nutrition Service, Hospital Gregorio Marañón, 28007 Madrid, Spain
6. Endocrinology and Nutrition Service, Hospital Universitario Infanta Sofía, 28702 San Sebastián De Los Reyes, Spain