Iqbal, Saira Perwaiz, Ghulam Nabi Kakepoto, and Saleem Perwaiz Iqbal. 2009. “VITAMIN B12 DEFICIENCY-A MAJOR CAUSE OF MEGALOBLASTIC ANAEMIA IN PATIENTS ATTENDING A TERTIARY CARE HOSPITAL”. Journal of Ayub Medical College Abbottabad 21 (3):92-94. https://www.jamc.ayubmed.edu.pk/index.php/jamc/article/view/3226.