Cohen, Y., et al. “Treatment of Diffuse Histiocytic and Diffuse Mixed Non-Hodgkin Lymphomas With Cyclophosphamide, Doxorubicin, Vincristine and Prednisone (Chop)”. Acta Oncologica, vol. 27, no. 5, Jan. 1988, pp. 531-5, doi:10.3109/02841868809093583.