Pengaruh External Counterpulsation (ECP) terhadap Vascular Endothelial Growth Factor-A (VEGF-A) dan Vascular Endothelial Growth Factor Receptor-2 (VEGFR-2), serta hubungannya dengan micro ribonucleic acid 92a (miR-92a) pada Pasien Penyakit Jantung Koroner = The effect of External Counterpulsation (ECP) on Vascular Endothelial Growth Factor-A (VEGF-A) and Vascular Endothelial Growth Factor Receptor-2 (VEGFR-2), and its relationship with micro ribonucleic acid 92a (miR-92a) in Coronary Artery Disease Patients