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Deposition of budesonide actuated from Embocaps® VG (Suheung), Vcaps® (Capsugel), Quali-V® I (Qualicaps), and ACGcaps™ HI (ACG) in different NGI stages at 2-kPa (a) and 4-kPa (b) pressure drop conditions. Data are shown as the mean ± standard deviation and analyzed by ANOVA analysis with post hoc Tukey’s multiple comparison test. *P < 0.05, **P < 0.01, N = 4 replicates
