“Comparison of Bronchodilator Response of Nebulized Salbutamol With Nebulized Salbutamol and Ipratropium Bromide in Patients With Acute Exacerbation of Advanced COPD”. 2022. TAJ: Journal of Teachers Association 34 (2): 56-63. https://doi.org/10.3329/taj.v34i2.58556.