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Kenchugundu Jagadeesh, Rayachooti Vandana, Bhyalla Akshay Varun, Dr. Gadwala Vinod and Bariki Rajasekhar. A comparative study on safety profile and efficacy of salmeterol and tiotropium in COPD Patients. World Journal of Advanced Research and Reviews, 2024, 22(2), 1306-1312. Article DOI: https://doi.org/10.30574/wjarr.2024.22.2.1505