1. Molecular Cardiology Division, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia (D.F., M.O.).
2. School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, New South Wales, Australia (D.F.).
3. Cardiology Department, St. Vincent’s Hospital, Darlinghurst, New South Wales, Australia (D.F.).
4. Division of Cardiology, Massachusetts General Hospital, Boston (K.J.B.).
5. Department of Genetics, Harvard Medical School, Boston, MA (K.J.B.).