[1] Sun Yat sen Univ, Dept Nasopharyngeal Carcinoma, Canc Ctr, Guangzhou, Peoples R China
[2] Sun Yat sen Univ, Canc Ctr, Guangzhou, Peoples R China
[3] Sun Yat sen Univ, Dept Nasopharyngeal Carcinoma, Collaborat Innovat Ctr Canc Med,Canc Ctr, State Key Lab Oncol South China,Guangdong Key Lab, Guangzhou, Peoples R China
[4] Sun Yat sen Univ, Clin Trials Ctr, Canc Ctr, Guangzhou, Peoples R China
[5] Sun Yat sen Univ, Sun Yat sen Univ Canc Ctr, Collaborat Innovat Ctr Canc Med, State Key Lab Oncol South China, Guangzhou, Peoples R China