- Correspondence to Professor Wangjian Zhang, Department of Medical Statistics, School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China; ; Professor Yuantao Hao, Peking University Center for Public Health and Epidemic Preparedness & Response, Peking University, Beijing, China;
- Received February 22, 2023
- Accepted April 1, 2023
- First published April 24, 2023.
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