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Correlation plots of the mean concentrations of measured indoor particulate matter in each home (n = 43).
r = Spearman correlation coefficient, UVPM = ultraviolet light absorbing particulate matter (light absorbing PM2.5 emitted from smoldering organics such as smoking cigarettes and burning fireplace wood), BC = black carbon, PM2.5 = particulate matter with aerodynamic diameter ≤ 2.5 μm, Fungi = fungal spore equivalents per cubic meter (SE/m3).
