Superiority of alternating non-cross-resistant chemotherapy in extensive small cell lung cancer. A multicenter, randomized clinical trial by the National Cancer Institute of Canada.

The National Cancer Institute of Canada Clinical Trials Group conducted a prospective randomized study comparing standard chemotherapy with alternating chemotherapy in patients with extensive small cell lung cancer. "Standard" treatment consisted of cyclophosphamide (1000 mg/m2 body surface area); doxorubicin (50 mg/m2), and vincristine (2 mg) every 3 weeks for six courses. Alternating chemotherapy was cyclophosphamide, doxorubicin, and …