5Gu D, Kelly TN, Wu X, et al. Mortality attributable to smoking in China [J]. N Engl J Med,2009,360(2):150-159.
6Li D, Yang X, Ge Z, et al. Cigarette smoking and risk of completed suicide: a meta-analysis of prospective cohort studies [J]. J Psychiatr Res,2012,46( 10):1957-1266.