Oxidant air pollution and school absenteeism.
D000041:Absenteeism; D000397:Air Pollution; D002140:California; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012141:Respiratory Tract Infections / Q000453:epidemiology; D012572:School Health Services; D012621:Seasons; D013223:Statistics as Topic; D013334:Students; D013997:Time Factors