Hereditary systemic transthyretin amyloidosis: a clinical case and an opinion on the problem oleh A. S. Draganova, A. V. Soboleva, A. E. Ertman, T. A. Galanskaya, E. I. Nikolaychuk, D. V. Ryzhkova, E. A. Polyakova, E. V. Shlyakhto