Chang AY, Kim K, Boucher H, Bonomi P, Stewart JA, Karp DD, Blum RH. A randomized phase II trial of echinomycin, trimetrexate, and cisplatin plus etoposide in patients with metastatic nonsmall cell lung carcinoma: an Eastern Cooperative Oncology Group Study (E1587). Cancer. 1998 Jan 15; 82(2):292-300.