Abbas, S. A., Saboor, S., & Kanani, H. (2019). Evaluating the technique of using inhalation device (MDI) without holding chamber/spacer in asthma and Chronic Obstructive Pulmonary Disease. Pakistan Journal of Chest Medicine, 24(4), 191–196. Retrieved from https://www.pjcm.net/index.php/pjcm/article/view/560