Takahashi, Koji, Mitsuharu Ueda, Yushi Utsunomiya, Hiroe Morioka, Shigeki Uemura, Tomoki Sakaue, and Katsuji Inoue. “What Are the Safest and Easiest Extra-Cardiac Biopsy Sites for the Diagnosis of Wild-Type Transthyretin Cardiac Amyloidosis? Confirmation of the Diagnosis by Biopsy of the Pectoralis Muscle During Pacemaker Insertion”. European Journal of Case Reports in Internal Medicine 12, no. 10 (September 16, 2025). Accessed November 3, 2026. https://ejcrim.com/index.php/ejcrim/article/view/5785.