1. Department of Genetics and Bioinformatics, Norwegian Institute of Public Health, Oslo, Norway
2. Genetics and Genome Biology Program, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada
3. Genetics and Genome Biology Program, Research Institute, The Hospital for Sick Children and Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
4. Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
5. B.C. Children’s Hospital Research Institute, Vancouver, British Columbia, Canada
6. Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA
7. Department of Human Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
8. Department of Epidemiology, University of California Los Angeles, Los Angeles, CA 90095, USA
9. Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
10. Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
11. Department of Biostatistics, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA 90095, USA