Reihan Rendika, Hidayah Apriliawan and Aprilia Puteri Santika 2026. Evaluation Of The Use Of Mdi And Dpi Inhaler Preparations In Chronic Obstructive Pulmonary Disease (Copd) Patients At Uns Hospital. International Journal of Health Engineering and Technology. 4, 6 (Mar. 2026). DOI:https://doi.org/10.55227/ijhet.v4i6.627.