1. From the Division of Cardiovascular Medicine, Department of Internal Medicine (H.H.A., C.-I.A., J.C.R.), and Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine (K.G.), School of Medicine, University of California, Davis; and Department of Molecular Biosciences (M.W.L.), and Department of Pathology, Microbiology, and Immunology (D.W.W.), School of Veterinary Medicine, University of California, Davis.