1. Department of Epidemiology Research Statens Serum Institut Copenhagen Denmark
2. Department of Obstetrics Copenhagen University Hospital Herlev Herlev Denmark
3. Department of Obstetrics Copenhagen University Hospital Hvidovre Hvidovre Denmark
4. Danish National Biobank Statens Serum Institut Copenhagen Denmark
5. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark
6. Department of Medicine Stanford University School of Medicine Stanford California USA
7. Department of Obstetrics Copenhagen University Hospital Rigshospitalet Copenhagen Denmark