1. Heart, Lung, Blood and Vascular Medicine Institute (A.A.M.D.-O., J.C.G., S.Y., H.M.S., K.C.W., A.C.S.), University of Pittsburgh, PA.
2. Department of Pharmacology and Chemical Biology (A.A.M.D.-O., J.C.G., H.M.S., A.C.S), University of Pittsburgh, PA.
3. Center for Microvascular Research (A.C.S.), University of Pittsburgh, PA.