[1] Maastricht Univ, Med Ctr, Grow Sch Oncol, Dept Radiat Oncol Maastro, Maastricht, Netherlands
[2] Zhejiang Canc Hosp, Hangzhou, Peoples R China
[3] Univ Hong Kong, Queen Mary Hosp, Hong Kong, Peoples R China
[4] Univ Hong Kong, Shenzhen Hosp, Shenzhen, Peoples R China
[5] Maastricht Univ, Med Ctr, Grow Sch Oncol & Dev Biol, Dept Pulm Dis, Maastricht, Netherlands