*AL-Jahdali et al. (2013). Improper inhaler technique is associated with poor asthma control and frequent emergency department visits. Retrieved from https://www.researchgate.net/publication/236063055_Improper_inhaler_technique_is_associated_with_poor_asthma_control_and_frequent_emergency_department_visits
Lewis, A. (2016). The economic burden of asthma and chronic obstructive pulmonary disease and the impact of poor inhalation technique..”. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4942909/