[1] Zhejiang Univ, Sch Med, Affiliated Hosp 2, Dept Radiat Oncol, Hangzhou, Peoples R China
[2] Zhejiang Univ, Sch Med, China Natl Minist Educ, Key Lab Canc Prevent & Intervent, Hangzhou, Peoples R China
[3] Zhejiang Univ, Sch Med, Affiliated Hosp 2, Dept Oncol, Hangzhou, Peoples R China