Goud , M. A. . . . . . . . . . . . . . .; Diwate , D. A. . . . . . . . . . . . .; Anap, D. D.; Ahya , D. N. . . . . . . . . . . . . . . . . . . . . . Comparison of Acapella TM Versus Flutter for Airway Clearance In COPD Patients – A Cross Over Trial. VIMSHSJ 2016, 3, 47-49.