Singh, C. V.; Gautam, A. K.; Dixit, A.; Singh, A. V.; Singh, S. K. A Randomized Prospective Study to Compare the Efficacy and Safety of Budesonide Plus Formoterol and Tiotropium Plus Formoterol in Patients Having Mild to Moderate Chronic Obstructive Pulmonary Disease. Int J Basic Clin Pharmacol 2021, 10, 245-250.