1 | Center for Tobacco Control Research, Zhejiang University School of Medicine, Hangzhou, China |
2 | Hangzhou Hospital for the Prevention and Treatment of Occupational Diseases, Hangzhou, China |
3 | Public Health Studies Program, School of Health and Applied Human Sciences, University of North Carolina, Wilmington, USA |
4 | Tobacco Control Office, Chinese Center for Disease Control and Prevention, Beijing, China |
5 | Department of Health Sciences, California State University, Northridge, USA |