The effects of air cleaners on hay fever symptoms in air-conditioned homes.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000389:Air Conditioning; D000397:Air Pollution / Q000517:prevention & control*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008851:Micropore Filters; D008875:Middle Aged; D011058:Pollen; D006255:Rhinitis, Allergic, Seasonal / Q000517:prevention & control*