[1
]
Department of Health Economics, School of Administration, Chengdu University of Traditional
Chinese Medicine, Chengdu, China;
[2
]
Department of Internal Medicine, University of California, Davis, Sacramento, CA;
ektong@ucdavis.edu.
[3
]
Department of Health Economics, Huaxi School of Public Health, University of Sichuan,
Chengdu, China;
[4
]
School of Public Health, University of California, Berkeley, Berkeley, CA; Center
for International Tobacco Control, Public Health Institute, Berkeley, CA.
[5
]
Center for International Tobacco Control, Public Health Institute, Berkeley, CA.