Comment on

• Contrasting male and female trends in tobacco-attributed mortality in China: evidence from successive nationwide prospective cohort studies.

  Chen Z, Peto R, Zhou M, Iona A, Smith M, Yang L, Guo Y, Chen Y, Bian Z, Lancaster G, Sherliker P, Pang S, Wang H, Su H, Wu M, Wu X, Chen J, Collins R, Li L; China Kadoorie Biobank (CKB) collaborative group. Chen Z, et al. Lancet. 2015 Oct 10;386(10002):1447-56. doi: 10.1016/S0140-6736(15)00340-2. Lancet. 2015. PMID: 26466050 Free PMC article. Review.