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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Environ Res. 2014 Apr 5;131:95–103. doi: 10.1016/j.envres.2014.02.017

Fig. 2. Follow-up of children for (a) airborne residential indoor PAH monitoring and (b) urinary PAH metabolite data.

Fig. 2

I: one measure, II: two measures, III: three measures; IV: four measures; Only 27 children had indoor monitoring data at all three age-points and 179 children had urinary PAH metabolite data at all four time-points.