Hirano, Toru, Yuichi Maeda, Kosuke Ebina, Koji Nagai, Yonsu Son, Hideki Amuro, Ryota Hara, Motomu Hashimoto, and Astushi Kumanogoh. 2019. “Clinical Course of Amyloid A Amyloidosis Secondary to Rheumatoid Arthritis Treated With Anti-Rheumatic Drugs Including Biologic Agent: Case Series in Answer Cohort”. Archives of Clinical and Medical Case Reports, November, 508-17. https://fortunejournals.org/ojs/index.php/acmcr/article/view/22231.