[1] Chinese Ctr Dis Control & Prevent, Ctr Chron & Noncommunicable Dis Control & Prevent, Beijing 100050, Peoples R China
[2] Canc Council Victoria, VicHlth Ctr Tobacco Control, Melbourne, Vic, Australia
[3] Univ Waterloo, Dept Psychol, Waterloo, ON N2L 3G1, Canada
[4] Univ Waterloo, Dept Stat & Actuarial Sci, Waterloo, ON N2L 3G1, Canada
[5] Univ Sains Malaysia, Natl Poison Ctr, George Town, Malaysia