1. From the Institute of Pathology, University of Padua Medical School, Padua, Italy (C.B., F.C., G.T.); Caspary Research Institute of the Animal Medical Center, New York, NY (P.R.F.); the Ohio State University College of Veterinary Medicine, Columbus (K.M.M., A.W.S.); the Department of Pediatrics (Cardiology), Baylor College of Medicine, Houston, Tex (J.A.T.); and the Minneapolis Heart Institute Foundation, Minneapolis, Minn (B.J.M.).