Arshad, Muhammad Sohail, and Syed Najam Hyder. “EVIDENCE OF ABNORMAL LEFT VENTRICULAR FUNCTION IN PATIENTS WITH THALASSAEMIA MAJOR: AN ECHOCARDIOGRAPHY BASED STUDY”. Journal of Ayub Medical College Abbottabad, vol. 21, no. 2, June 2009, pp. 37-41, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/3330.