1. From Amyloidosis Center (L.H.C., F. Sam, M.S., F. Salinaro, F.L.R., J.L.B., D.C.S.), Department of Pathology and Laboratory Medicine (L.H.C), and Department of Medicine (F. Sam, M.S., F.L.R., J.L.B., D.C.S.), Boston University School of Medicine, MA; Department of Medicine, University of Pavia, Italy (F. Salinaro); and Department of Biostatistics, Boston University School of Public Health, MA (F. Sun).