Ghani, Imran, et al. “OUTCOME OF PERCUTANEOUS MITRAL VALVE COMMISSUROTOMY ON MITRAL VALVE AREA , PULMONARY HYPERTENSION AND DYSPNEA CLASS”. Pakistan Armed Forces Medical Journal, vol. 66, no. SUPPL-1, Mar. 2022, pp. S26-29, https://pafmj.org/PAFMJ/article/view/8323.