The effect of pretreatment of human or rabbit platelets with chymotrypsin on their responses to human fibrinogen and aggregating agents - Greenberg, J P; Packham, M A; Guccione, M A; Harfenist, E J; Orr, J L; Kinlough-Rathbone, R L; Perry, D W; Mustard, J F (Blood, 1979)