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. Author manuscript; available in PMC: 2013 May 17.
Published in final edited form as: Environ Res. 2009 Jun 21;109(6):10.1016/j.envres.2009.06.001. doi: 10.1016/j.envres.2009.06.001

Fig. 7.

Fig. 7

Model predictions of natural log-transformed NO, NO2 and NOx (a, b and c) and corresponding cross-validation results (d, e and f).