1 | Center for Tobacco Control Research, Zhejiang University School of
Medicine, Yuhangtang Road, China |
2 | Health Services
Administration Program, University of Evansville, Evansville, USA |
3 | Public Health Studies Program, School of Health and Applied Human
Sciences, University of North Carolina, Wilmington, USA |
4 | Department of Epidemiology, School of Public Health, and Injury Control
Research Center, West Virginia University, Morgantown, WV 26506-9190, USA |