Spacers and holding chambers: not the last word, we hope.
Mitchell
J P
JP
D000336:Aerosols; D018927:Anti-Asthmatic Agents / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy*; D002648:Child; D016503:Drug Delivery Systems; D004867:Equipment Design; D006801:Humans
D000336:Aerosols; D018927:Anti-Asthmatic Agents