Characterization of a platelet-activating factor receptor antagonist isolated from haifenteng (Piper futokadsura): specific inhibition of in vitro and in vivo platelet-activating factor-induced effects - Shen, T Y; Hwang, S B; Chang, M N; Doebber, T W; Lam, M H T; Wu, M S; Wang, X; Han, G Q; Li, R Z (Proc Natl Acad Sci USA, 1985)