Appendix: Supplemental References

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 ozone^{1,4,6,8,9,10,11,14-16,19,24,25,28,29} 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
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