Appendix: Supplemental References
The results from this study are generally consistent with previously reported associations of ambient air pollution and respiratory morbidity.1-41 ED visits for respiratory outcomes have been relatively consistently associated with ozone1,4,6,8,9,10,11,14-16,19,24,25,28,29 and PM10,2,10,17,19,20,24,25,29 and to a lesser extent with NO2,5,11,13,16,29 SO2,3,6,8,13,17,24 and CO.20,28 REFERENCES
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