Alqadeeb, H.A., Alabeidi, F., Alosaimi, F.M., Alshammari, I.F., Al Shamry, M.H., Alamri, A.M.M., Alsulaiman, A.I., Al-Harbi, M.S.A., Almutairi, F.M.H., Almzairie, K.A., Al Nemer, A.A.R., Alshammari, M.T.S. and Albabtain, M.I.S. 2019. Nebulizers, inhalers, and spirometers for Chronic Obstructive Pulmonary Disease (COPD) and asthma- An updated review. International journal of health sciences. 3, S1 (Jan. 2019), 386–400. DOI:https://doi.org/10.53730/ijhs.v3nS1.15258.