1. Department of Epidemiology Research Statens Serum Institut Copenhagen Denmark
2. Department of Clinical Pharmacology Copenhagen University Hospital Bispebjerg Copenhagen Denmark
3. Department of Clinical Medicine University of Copenhagen Denmark
4. Department of Health Policy and Department of Medicine Stanford University School of Medicine Stanford CA
5. Department of Genetics Stanford University School of Medicine Stanford CA
6. Center for Fertility and Health Norwegian Institute of Public Health Oslo Norway
7. K.G. Jebsen Center for Genetic Epidemiology Norwegian University of Science and Technology Trondheim Norway