Muhammad Zubair Khan et al. 2022. FREQUENCY OF CAUSES OF INHALATION THERAPY FAILURE IN ASTHMA PATIENTS PRESENTING TO A TERTIARY CARE HOSPITAL IN PESHAWAR. Journal of Population Therapeutics and Clinical Pharmacology. 29, 04 (Nov. 2022), 5096–5102. DOI:https://doi.org/10.53555/4nzg3575.