1. Division of Pediatric Endocrinology (M.W., N.W., P.-M.H., F.G.R.), Department of Pediatrics, Christian-Albrechts Universität zu Kiel, 24105 Kiel, Germany
2. Children’s Hospital of Bremen-Nord (G.S.-S.), 28755 Bremen, Germany
3. Division of Pediatric Endocrinology (H.G.D.), Department of Pediatrics and Adolescent Medicine, Friedrich-Alexander-University of Erlangen-Nürnberg, 91054 Erlangen, Germany
4. Laboratory of Molecular Genetics (E.S.), 69121 Heidelberg, Germany
5. University of Manchester (G.S., P.C.), Manchester M13 9PL, United Kingdom
6. Institute of Biochemistry (J.G.), Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany