1. From the Metabolism Unit (P.P., B.A., B.F., M.R.), Center for Metabolism and Endocrinology, Department of Medicine, and the Molecular Nutrition Unit, Center for Nutrition and Toxicology Novum, Karolinska Institute at Huddinge University Hospital, Stockholm, Sweden; and the Division of Reproductive Endocrinology (A.S-E., B.F., H.E.), Department of Woman and Child Health, Karolinska Institute at Karolinska Hospital, Stockholm, Sweden.