Selective deficiency in collagen-induced platelet aggregation during L-asparaginase therapy - Shapiro, R S; Gerrard, J M; Ramsay, N K; Nesbit, M E; Coccia, P F; Stoddard, S F; Plow, E F; White, J G; Krivit, W (Am J Pediatr Hematol, 1980)