title: Statistical analyses of air pollution sampling frequency in an epidemiologic study.
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D003153:Community Health Services; D004812:Epidemiologic Methods; D005374:Filtration; D005740:Gases / Q000032:analysis; D008670:Metals / Q000032:analysis; D008722:Methods; D008824:Michigan; D013223:Statistics as Topic
chemical_list: D005740:Gases; D008670:Metals