Histamine inhalation tests: inhalation of aerosol via a facemask versus a valve box with mouthpiece.
D000328:Adult; D000336:Aerosols; D001249:Asthma / Q000175:diagnosis; D001985:Bronchial Provocation Tests / Q000295:instrumentation*; D006632:Histamine; D006801:Humans; D008397:Masks
D000336:Aerosols; D006632:Histamine