1. Division of Human Nutrition and Epidemiology, Wageningen Agricultural University, 6700 EV Wageningen
2. Department of Obstetrics and Gynaecology, University Hospital St. Radboud, 6500 HB Nijmegen
3. Department of Chemical Endocrinology, University Hospital St. Radboud, 6500 HB Nijmegen
4. Laboratory of Metabolic Diseases, Wilhelmina Children's Hospital, 3501 CA Utrecht
5. Unilever Research Vlaardingen, 3130 AC Vlaardingen, the Netherlands
6. Department of Epidemiology, University Hospital St. Radboud, 6500 HB Nijmegen