Keywords: فرمول پودر خشک; DPI; Dry powder inhaler; CF; cystic fibrosis; COPD; chronic obstructive pulmonary disease; pMDIs; pressurized metered dose inhalers; TB; tuberculosis; VdW; Van der Waals; FPF; fine particle fraction; MMAD; mass median aerodynamic diameter; LPPs; large por