Asif Mattoo, Faisal R Guru, Haider Rashid, and Saika Amreen. 2021. “Non-Invasive Qp/Qs Ratio Measurement With Phase Contrast MRI and Echocardiography in Patients With Atrial Septal Defect: Comparison With Heart Catheterization”. International Journal of Health and Clinical Research 4 (11):295-99. https://ijhcr.com/index.php/ijhcr/article/view/2693.