About the Authors

Zhaoying Li

Roles Formal analysis, Methodology, Validation, Writing – original draft, Writing – review & editing

Affiliation Department of Epidemiology and Health Statistics, the College of Public Health of Qingdao University, Qingdao, Shandong Province, People’s Republic of China

Weijing Wang

Roles Conceptualization, Validation

Affiliation Department of Epidemiology and Health Statistics, the College of Public Health of Qingdao University, Qingdao, Shandong Province, People’s Republic of China

Xiaocao Tian

Roles Software

Affiliations Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, People’s Republic of China, Qingdao Institute of Preventive Medicine, Qingdao, Shandong Province, People’s Republic of China

Haiping Duan

Roles Resources

Affiliations Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, People’s Republic of China, Qingdao Institute of Preventive Medicine, Qingdao, Shandong Province, People’s Republic of China

Chunsheng Xu

Roles Methodology

Affiliations Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, People’s Republic of China, Qingdao Institute of Preventive Medicine, Qingdao, Shandong Province, People’s Republic of China

Dongfeng Zhang

Roles Validation

zhangdf1961@126.com

Affiliation Department of Epidemiology and Health Statistics, the College of Public Health of Qingdao University, Qingdao, Shandong Province, People’s Republic of China

Competing Interests

The authors have declared that no competing interests exist.