[1] Soochow Univ, Affiliated Hosp 1, Dept Anesthesiol, Suzhou, Jiangsu, Peoples R China
[2] Univ Calif Davis Hlth, Dept Anesthesiol & Pain Med, Sacramento, CA 95814 USA
[3] Soochow Univ, Coll Med, Sch Publ Hlth, Dept Epidemiol & Biostat, Suzhou, Jiangsu, Peoples R China