Seguban, Joseph Marc S., et al. “Referral Rate of Admitted Cardiovascular Patients Eligible for Cardiac Rehabilitation in a Private Level 3 General Hospital: A Three-Year Retrospective Study”. Cardiology and Cardiovascular Medicine, vol. 3, no. 5, Sept. 2019, pp. 340-51, http://www.fortunejournals.org/ojs/index.php/ccm/article/view/15720.