[1] Cent South Univ, Pain Management Dept, Hunan Canc Hosp, Affiliated Canc Hosp,Xiangya Sch Med, Changsha, Peoples R China
[2] Cent South Univ, Hlth Management Ctr, Hunan Canc Hosp, Affiliated Canc Hosp,Xiangya Sch Med, Changsha, Peoples R China
[3] Cent South Univ, Nursing Dept, Hunan Canc Hosp, Affiliated Canc Hosp,Xiangya Sch Med, Changsha, Peoples R China
[4] Cent South Univ, Xiangya Sch Med, Affiliated Canc Hosp, Head & Neck Surg Dept,Hunan Canc Hosp, Changsha, Peoples R China
[5] Cent South Univ, Xiangya Sch Med, Affiliated Canc Hosp, Vasc Access Ctr,Hunan Canc Hosp, Changsha, Peoples R China
[6] Ottawa Hosp Res Inst, OMNI Res Grp, Ottawa, ON, Canada
[7] Univ Ottaw, Fac Med, Dept Obstet & Gynecol, Ottawa, ON, Canada
[8] Univ Ottaw, Fac Med, Sch Epidemiol & Publ Hlth, Ottawa, ON, Canada
[9] Cent South Univ, Xiangya Sch Med, Affiliated Canc Hosp, Adm Off,Hunan Canc Hosp, Changsha, Peoples R China