1. Institute for Statistical and Epidemiological Cancer Research Finnish Cancer Registry Helsinki Finland
2. Department of Public Health and Welfare Finnish Institute for Health and Welfare (THL) Helsinki Finland
3. Department of General Practice and Primary Health Care University of Helsinki and Helsinki University Hospital Helsinki Finland
4. Folkhälsan Research Center Helsinki Finland
5. Singapore Institute for Clinical Science, Agency for Science, Technology and Research Singapore Singapore
6. Department of Obstetrics and Gynaecology and Human Potential Translational Research Programme Yong Loo Lin School of Medicine, National University of Singapore Singapore Singapore
7. Department of Public Health University of Helsinki Helsinki Finland
8. School of Mathematics and Statistics, Faculty of Science University of New South Wales Sydney Australia
9. Faculty of Social Sciences Health Sciences, Tampere University Tampere Finland