76. Clavel, M., et al., Randomized comparison of cisplatin, methotrexate, bleomycin and vincristine (CABO) versus cisplatin and 5- fluorouracil (CF) versus cisplatin (C) in recurren t or metastatic squamous cell carcinoma of the head and neck. A phase III study of the EORTC Head and Neck Cancer Cooperative Group. Ann Oncol, 1994. 5(6): p. 521-6.