1. Division of Endocrinology (M.P.B., L.J.H., K.v.d.W., S.W.J.L., J.A.M.J.L.J.), Department of Internal Medicine, Erasmus Medical Center, 3015 GE Rotterdam, The Netherlands
2. Division of Pediatric Endocrinology Section (M.B.R., K.W.), University Children’s Hospital, D-72074 Tuebingen, Germany
3. Division of Medical Research Laboratories (J.F.), Clinical Institute and Medical Department M, Aarhus University Hospital, DK-8000 Aarhus C, Denmark