- Further observations on the inhibition of tumor growth by Corynebacterium parvum with cyclophosphamide. V. Comparison of the effects of tilorone hydrochloride, levamisole, methanol-soluble fraction of Mycobacterium butyricum, BCG, and a nonviable aqueous ether extract of Brucella abortus preparation in treatment of mice with tumors. Fisher, B., Linta, J., Hanlon, J., Saffer, E. J. Natl. Cancer Inst. (1978)