Haq, Zia Ul, Anila Basit, Zafar Iqbal, Jawad Khan, Raza Ullah, Muhammad Amin, Zia Ullah, Mohammad Yousaf Khan, and Arshad Javaid. “Analysis of Metered Dose Inhaler Technique Errors in Patients With Obstructive Airway Diseases”. Pakistan Journal of Chest Medicine 24, no. 2 (August 29, 2018): 64–71. Accessed November 1, 2025. https://pjcm.net/index.php/pjcm/article/view/521.