Ahmad, Waqas, Saadia Ashraf, Abdul Wahab, Rukhsana Farooqi, and Hussain Ahmad. 2020. “Frequency of Blood Eosinophilia in COPD Patients Admitted With Acute Exacerbation”. Pakistan Journal of Chest Medicine 26 (1):28-32. http://pjcm.net/index.php/pjcm/article/view/641.