1. Research Institute of Child Nutrition (L.S., A.E.B., T.R.), 44225 Dortmund, Germany;
2. Steroid Research and Mass Spectrometry Unit (S.A.W., M.F.H.), Center of Child and Adolescent Medicine, Justus-Liebig-University, 35392 Giessen, Germany;
3. Department of Pharmacology (C.M.-G.), Steroid Laboratory, University of Heidelberg, 69120 Heidelberg, Germany