Cheragh, H, Mahmood ul Hassan, Mohammad Hafizullah, and Adnan Mehmood Gul. 2009. “OUTCOME OF BALLOON PULMONIC VALVULOPLASTY WITH 18 MONTHS FOLLOW UP”. Journal of Ayub Medical College Abbottabad 21 (3):95-99. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/3227.