1. Centre for Endocrinology, Diabetes, and Metabolism (N.R., J.I., B.A.H., H.E.I., V.D., N.K., C.H.L.S., W.A.), School of Clinical and Experimental Medicine, University of Birmingham, Birmingham B15 2TT, United Kingdom
2. Department of Endocrinology (N.R.), Medizinische Klinik and Poliklinik IV, University Hospital Munich, 80336 Munich, Germany
3. Department of Pediatrics (O.A.A.-R., L.G.H.), University of Mississippi Medical Center, Jackson, Mississippi 39216
4. Munroe-Meyer Institute (A.H.O., S.N.), University of Nebraska Medical Center, Omaha, Nebraska 68198
5. Department of Clinical Genetics (R.H.), City Hospital, Nottingham University Hospitals National Health Service Trust, Nottingham NG5 1PB
6. Department of Clinical Genetics (E.M.B.), John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom