1. Division of Reproduction, Department of Clinical Sciences, Swedish University of Agricultural Sciences, The Centre for Reproductive Biology in Uppsala, SE-750 07 Uppsala, Sweden
2. Department of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden
3. Department of Womeńs and Childreńs Health, Uppsala University, SE-751 85 Uppsala, Sweden
4. Carl von Linnékliniken, SE-751 83 Uppsala, Sweden
5. Division of Obstetrics and Gynecology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet and Karolinska University Hospital, SE-141 86 Stockholm, Sweden