Kirkwood JM, Harris JE, Vera R, Sandler S, Fischer DS, Khandekar J, Ernstoff MS, Gordon L, Lutes R, Bonomi P, et al. A randomized study of low and high doses of leukocyte alpha-interferon in metastatic renal cell carcinoma: the American Cancer Society collaborative trial. Cancer Res. 1985 Feb; 45(2):863-71.