Jan, H. U., M. ul Hassan, and M. Hafizullah. “Long Term Echocardiographic Follow up of Percutaneous Transvenous Mitral Commissurotomy (PTMC)”. Journal of Postgraduate Medical Institute, vol. 18, no. 3, Oct. 2011, https://jpmi.org.pk/index.php/jpmi/article/view/927.