| Affiliation: | 1. Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark;2. Department of Epidemiology and Social Science on Reproductive Health, Shanghai Institute of Planned Parenthood Research, WHO Collaborating Center for Research in Human Reproduction, National Population & Family Planning Key Laboratory of Contraceptive Drugs and Devices, Shanghai, China;3. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, CA, USA;4. National Centre for Register‐Based Research, Aarhus University, Aarhus, Denmark;5. CIRRAU‐Centre for Integrated Register‐based Research, Aarhus University, Aarhus, Denmark |
