1. Tuscan Regional Amyloidosis Center, Careggi University Hospital, Florence, Italy (F.C., E.V., R. Martone, S.M., G.T., S.B., F.P.).
2. Emergency Department, Amyloid Research and Treatment Center, IRCCS Policlinico San Matteo Foundation, University of Pavia, Italy (S.P., R. Mussinelli, A.S.).
3. Division of General Cardiology, Cardiothoracovascular Department, Careggi University Hospital, Florence, Italy (M.G., A.L., G.N., N.M.).
4. Division of Interventional Structural Cardiology, Cardiothoracovascular Department, Careggi University Hospital, Florence, Italy (C.D.M.).
5. Cardiomyopathy Unit, Cardiothoracovascular Department, Careggi University Hospital, Florence, Italy (I.O.).