1. Amyloidosis Research and Treatment Center, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy;
2. Department of Molecular Medicine, University of Pavia, Pavia, Italy;
3. Internal Medicine, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy; and
4. Department of Internal Medicine, University of Pavia, Pavia, Italy