1. From the Department of Physiology, Pharmacology (S.P.K.), and Sol Sherry Thrombosis Research Center (S.P.K.), Temple University School of Medicine, Philadelphia, PA (Y.S.B.-S., P.L., J.J., K.B., M.C.R., S.K., S.P.K.); and the Department of Biological Sciences, University of Delaware, Newark, DE. (D.W.).