Figure 1
Flow diagram of the study subjects. COPD chronic obstructive pulmonary disease, DPI dry powder inhaler, pMDI pressurized metered-dose inhaler, SMI soft mist inhaler.
Figure 1 | Scientific Reports
Flow diagram of the study subjects. COPD chronic obstructive pulmonary disease, DPI dry powder inhaler, pMDI pressurized metered-dose inhaler, SMI soft mist inhaler.
