1. From the Molecular Cardiology Laboratories (S.G.P.), IRCCS Salvatore Maugeri Foundation, Pavia, Italy; Cardiovascular Genetics (S.G.P.), Leon Charney Division of Cardiology, New York University; Department of Cardiology (S.G.P.), University of Pavia, Italy; and Libin Cardiovascular Institute of Alberta (S.R.W.C.), Departments of Physiology & Pharmacology and Biochemistry & Molecular Biology, University of Calgary, Alberta, Canada.