Intervention on inhalation technique of rotahaler in patients with chronic obstructive pulmonary disease and asthma - G.M. Khan; Paudel Badri; Thapa Parbati; Duwal Anita; Adhikari Atul; Paudel Deepak; Regmi Dipendra; Barakoti Himal; Gwachha Kabita; Koju Nirmala (Elsevier, 2016)