Swardfager, Walter, Nathan Herrmann, Yekta Dowlati, Paul Oh, Alex Kiss, and Krista L. Lanctôt. 2008. “Relationship Between Cardiopulmonary Fitness and Depressive Symptoms in Cardiac Rehabilitation Patients With Coronary Artery Disease”. Journal of Rehabilitation Medicine 40 (3):213-18. https://doi.org/10.2340/16501977-0151.