Cisplatin, tegafur-uracil and leucovorin plus mitomycin C: an acceptably effective and toxic regimen for patients with recurrent or metastatic nasopharyngeal carcinoma oleh Chia-Hsun Hsieh, Cheng-lung Hsu, Cheng-Hsu Wang, Chaung-Chi Liaw, Jen-Shi Chen, Hsien-Kun Chang, Tsai-Shen Yang, John Wen-Chen Chang, Yung-Chang Lin, Chi-Ting Liau, Ngan-Ming Tsang, Joseph Tung-Chieh Chang, Shu-Hang Ng, Hung-Ming Wang