Two months of doxorubicin-cyclophosphamide with and without intervall reinduction therapy compared with six months of cyclophosphamide, methotrexate, and fluorouracil in positive-node breast cancer patients with tamoxifen-nonresponsive tumors: Results from NSABP B-15. - Fisher,B.; Brown,A.M.; Dimitrov,N.V. (J Clin Oncol, 1990)