Perez, Colbert, and Alejandro Perez- Verdia. “Atrial Fibrillation: Risk Assessment”. The Southwest Respiratory and Critical Care Chronicles 2, no. 6 (April 8, 2014): 52-55. Accessed November 23, 2024. https://pulmonarychronicles.com/index.php/pulmonarychronicles/article/view/132.