Spacer devices in asthma.
Buchdahl
R
R
Ward
S
S
Summerfield
A
A
D000403:Airway Resistance; D018927:Anti-Asthmatic Agents / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy*; D004867:Equipment Design; D006801:Humans; D009330:Nebulizers and Vaporizers
D018927:Anti-Asthmatic Agents