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In vitro drug deposition the different formulations using the MSLI and the Aerolizer® DPI device at a 60 L/min flow rate: a spray-dried MA alone, b 0.05/99.95% (w/w) SS/MA, c 0.10/99.90% (w/w) SS/MA and d FPF of the formulations. Data represents the mean ± SD of three independent experiments
