1. Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
2. Chronic Disease Epidemiology Unit, Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
3. University of Basel, Basel, Switzerland
4. Population Health and Occupational Disease, NHLI, Imperial College London, London, United Kingdom
5. MRC-PHE Centre for Environment and Health, Imperial College London, London, United Kingdom
6. Department of Epidemiology and Biostatistics, MRC–PHE Centre for Environment and Health, School of Public Health, Imperial College London, London, United Kingdom
7. Department of Clinical Science, University of Bergen, Bergen, Norway
8. Department of Gynecology and Obstetrics, University of Bergen, Bergen, Norway