1. Department of Biostatistics, School of Public Health, and The Key Laboratory of Public Health Safety of Ministry of Education Fudan University Shanghai China
2. Shanghai Minhang Center for Disease Control and Prevention Shanghai China
3. Department of Public Health Aarhus University Aarhus Denmark
4. NCRR‐National Centre for Register‐based Research Aarhus University Aarhus Denmark
5. Department of Clinical Medicine‐Department of Clinical Epidemiology Aarhus University Aarhus Denmark
6. Shanghai Institute of Infectious Disease and Biosecurity Shanghai China