1. Institute of Human Genetics (A.L.M., H.J.C., R.S., S.H.S.P.), Newcastle University, United Kingdom
2. Royal Victoria Infirmary (K.O., S.H.S.P.), Newcastle upon Tyne NE1 3BZ, United Kingdom
3. Department of Medical Genetics (B.S., D.U.), Oslo University Hospital, Ullevål, N-0407 Oslo, Norway
4. Institute of Medical Genetics (B.S., D.U.), University of Oslo, N-0315 Oslo, Norway
5. Section of Endocrinology (A.B.W., E.H.), Institute of Medicine, N-5021 Bergen, Norway
6. Department of Medicine (E.H., M.E.), Haukeland University Hospital, N-5021 Bergen, Norway