1. From the Department of Pharmacology (J.M.S., J.C.S.,A.A.E.,D.M.P., J.S.P.), Vascular Biology Center (J.C.S., D.M.P., J.S.P.) and Department of Surgery (D.M.P.), Medical College of Georgia, Augusta; The St. Vincent’s Institute of Medical Research (B.E.K.) Fitzroy, Australia.