Ch., Muhammad Khalid, Muhammad Younus, Javeria Aijaz, Ashfaq-ur- Rehman, Sohail Anwar, Sajjad Hassan, Kashif Siddique, and M. Saqib Saeed. “Frequency of Anaemia in Chronic Obstructive Pulmonary Disease”. Annals of King Edward Medical University 17, no. 4 (November 9, 2012): 432. Accessed May 2, 2024. https://annalskemu.org/journal/index.php/annals/article/view/581.