[1] Tianjin Med Univ Canc Inst & Hosp, Dept Radiat Oncol, CyberKnife Ctr, Natl Clin Res Ctr Canc, Tianjin, Peoples R China
[2] Tianjin Med Univ Canc Inst & Hosp, Key Lab Canc Prevent & Therapy, Natl Clin Res Ctr Canc, Tianjin, Peoples R China
[3] Nankai Univ, Tianjin Union Med Ctr, Inst Integrat Oncol, Dept Oncol,Sch Med, Tianjin, Peoples R China
[4] Massachusetts Gen Hosp, Dept Radiat Oncol, Edwin L Steele Labs, Boston, MA 02114 USA
[5] Harvard Med Sch, Boston, MA 02115 USA
[6] Univ Hong Kong, HKU Shenzhen Hosp, Li Ka Shing Fac Med, Dept Clin Oncol, Shenzhen, Peoples R China