Erelund Sofia, Karp Kjell, Wiklund Urban, Arvidsson Sandra, and Hörnsten Rolf. “Are ECG Changes in Heart-Healthy Individuals of Various Ages Related to Cardiac Disease 20 Years Later?”. Upsala Journal of Medical Sciences 126, no. 1 (May 21, 2021). Accessed April 23, 2024. https://ujms.net/index.php/ujms/article/view/6064.