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George D. Leikauf, Sharon Kline, Roy E. Albert, C. Stuart Baxter, David I. Bernstein, Jonathan Bernstein, C. Ralph Buncher, Evaluation of a Possible Association of Urban Air Toxics and Asthma, Environmental Health Perspectives, Vol. 103, Supplement 6 (Sep., 1995), pp. 253-271
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Leikauf et al. (1995) studied this question.
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