- Four-drug combination chemotherapy (methotrexate, cyclophosphamide, hexamethylmelamine, and CCNU) for non-small cell bronchogenic carcinoma: a Cancer and Leukemia Group B study. Green, M., Horton, C., Spaulding, M., Silver, R.T., Berenberg, J., Kennedy, B.J., Pajak, T.F., Comis, R. J. Clin. Oncol. (1983)