[1] Sichuan Univ, West China Hosp, West China Sch Med, Chengdu, Sichuan Provinc, Peoples R China
[2] West China Hosp, Dept Vasc Surg, Chengdu, Sichuan Provinc, Peoples R China
[3] London Hlth Sci Ctr, Div Vasc Surg, London, ON, Canada
[4] Western Univ, London, ON, Canada
[5] Western Univ, Dept Epidemiol & Biostat, London, ON, Canada