1. Endocrinology and Diabetes Research Unit (G.P.d.N., E.F.-R., I.S., S.G., J.R.B., N.Z., L.C.), Hospital de Cruces, Barakaldo E48903, Basque Country, Spain
2. Pediatric Endocrinology Unit (B.G.-C.), Severo Ochoa Hospital, Leganés, 28911 Madrid, Spain
3. Department of Medicine, Nursing, and Pediatrics (S.G., J.R.B., L.C.), University of Basque Country, 48940 Leioa, Bizkaia, Spain
4. Department of Endocrinology Service (E.M.), Hospital de Navarra, 31080 Pamplona, Spain
5. Department of Endocrinology Service (M.J.M.), Hospital do Meixoeiro, 36200 Viga, Pontevedra, Spain
6. Pediatric Endocrinology, Growth, and Adolescence Unit (M.P.), Clinical University of Santiago de Compostela, 15706 Santiago de Compostela, A Coruña, Spain
7. Fundación Pública Galega de Medicina Xenómica (F.B.), 15706 Santiago de Compostela, A Coruña, Spain
8. Department of Pediatric and Adolescent Medicine (W.A., O.H.), University of Lübeck, 23538 Lübeck, Germany
9. Endocrine Unit (H.J., M.B.), Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114