1. Section of Specialized Endocrinology (A.P.J., T.S., J.B.), Department of Endocrinology, Oslo University Hospital, Rikshospitalet, N-0424 Oslo, Norway
2. Research Institute for Internal Medicine (T.U.), N-0316 Oslo, Norway
3. Centre for Rare Diseases (R.S.-C., S.F.), Department of Pediatrics, Aarhus University Hospital Skejby, DK-8200 C Aarhus N, Denmark
4. Frambu (K.F.R.), N-1404 Siggerud, Norway
5. Department of Endocrinology, Metabolism, and Diabetology (C.H.), Karolinska University Hospital, SE-171 76 Stockholm, Sweden
6. Department of Endocrinology and Internal Medicine (J.S.C.), Aarhus University Hospital, DK-8000 C Aarhus C, Denmark
7. Faculty of Medicine, and Faculty of Medicine (J.B.), University of Oslo, N-0316 Oslo, Norway