Barradas, Ana Rita, Francisco Albuquerque, Mariana Constante, Margarida Fonseca, Filipe Correia, and João Lopes Delgado. “Syncope Caused by a Head and Neck Cancer Controlled by a Permanent Pacemaker”. European Journal of Case Reports in Internal Medicine 7, no. 6 (March 31, 2020). Accessed May 3, 2024. https://www.ejcrim.com/index.php/EJCRIM/article/view/1533.