Effect of warfarin anticoagulation on survival in carcinoma of the lung, colon, head and neck and prostate: final report of VA Cooperative Study #75 - Zacharski, L R; Henderson, W G; Rickies, F R; Forman, W B; Cornell, C J; Forcier, R J; Edwards, R L; Headley, E; Kim, S-H; O’Donnell, J F; O’Dell, R; Tomyos, K; Kwaan, H C (Cancer, 1984)