1. Inborn metabolic disease unit, Internal Medicine Service, Hospital Universitario de Cruces, Baracaldo, Vizcaya, Spain
2. Unit of Diagnosis and Treatment of Congenital Metabolic Diseases, Internal Medicine Service, Hospital Clínico Universitario de Santiago, Santiago de Compostela, Spain
3. Endocrinology and Nutrition Service, C.U.S.R Congenital Metabolic Disease, Hospital Universitario Virgen del Rocío, Sevilla, Spain
4. Departament Endocrinology Metabolism and Nutrion, C.U.S.R Congenital Metabolic Disease, CIBER Physiopathology of Obesity and Nutrition (CIBERobn), Ramón y Cajal Health Research Institute (IRYCIS), Madrid, Spain
5. Inborn Metabolic Disease Service, C.S.U.R of Congenital Metabolic Diseases, Internal Medicine Service, Hospital 12 de octubre, Madrid, Spain
6. Endocrinology and Nutrition Department, Hospital Clinic, Barcelona, Spain
7. UGC Endocrinology and Nutrition, Hospital Regional Universitario de Málaga, Instituto de Biomedicina de Málaga (IBIMA) & CIBER de Diabetes y Enfermedades Metabólicas asociadas (CIBERDEM), Málaga, Spain