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38. Nitrogen dioxide and respiratory illness in children. Part III: Quality assurance in an epidemiologic study. Lambert WE, Samet JM, Skipper BJ, Cushing AH, Hunt WC, Young SA, McLaren LC, Schwab M, Spengler JD. Res Rep Health Eff Inst; 1994 Jul; (58):1-31. PubMed ID: 7946085 [Abstract] [Full Text] [Related]
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