Nakov, Radislav, Stayko Sarafov, Ventsislav Nakov, Mariana Gospodinova, Tihomir Todorov, Andrey Kirov, Albena Todorova, and Ivailo Tournev. “Gastrointestinal Manifestations in Hereditary Transthyretin Amyloidosis Associated With Glu89Gln Mutation”. Journal of Gastrointestinal and Liver Diseases 28, no. 4 (December 9, 2019): 421-426. Accessed February 18, 2020. https://www.jgld.ro/jgld/index.php/jgld/article/view/362.