1. Dartmouth Hitchcock Medical Center, Heart and Vascular Center, Lebanon, NH (L.G.G.).
2. The Dartmouth Institute, Geisel Medical School at Dartmouth, Hanover, NH (L.G.G.).
3. Department of Biostatistics, T.H. Chan Harvard School of Public Health, Boston, MA (F.D., Y.W.).
4. Cardiac Amyloidosis Program (M.S.E.-S., R.H.F., S.D.), Brigham and Women’s Hospital, Boston, MA.
5. Division of Nuclear Medicine and Department of Radiology (A.S., M.F.D.C., S.D.), Brigham and Women’s Hospital, Boston, MA.
6. Division of Cardiovascular Medicine (M.F.D.C., R.H.F., S.D.), Brigham and Women’s Hospital, Boston, MA.