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. 2021 Oct 15;8:748396. doi: 10.3389/fcvm.2021.748396

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Copyright © 2021 Ferrer-Gómez, Pian-Arias, Carretero-Barrio, Navarro-Cantero, Pestaña, de Pablo, Zamorano, Galán, Pérez-Mies, Ruz-Caracuel and Palacios.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Deposit of eosinophilic and amorphous material compatible with amyloid within the myocardium. (B) Positive Congo Red histochemical stain. (C) Positive transthyretin immunohistochemistry.