Letter: Use of pressurised aerosols by asthmatic patients.
D000336:Aerosols; D001249:Asthma / Q000188:drug therapy*; D001993:Bronchodilator Agents / Q000008:administration & dosage; D006801:Humans; D012119:Respiration
D000336:Aerosols; D001993:Bronchodilator Agents