Gemcitabine and cisplatin versus methotrexate, vinblastine, doxorubicin, and cisplatin in advanced or metastatic bladder cancer: results of a large, randomized, multinational, multicenter, phase III study - von der Maase, H; Hansen, SW; Roberts, JT (J Clin Oncol Off J Am Soc Clin Oncol, 2000)
et al.