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Seasonal effects of short-term changes in concentrations of air pollutants on hospital admissions. Percentage increase (and 95% CI) in all-cause, cardiovascular and respiratory admissions per 10 μg/m3increase in PM10 or 10 ppb increase in O3 (after adjusting for levels of PM10) by A) cold and warm months as indexed by monthly average temperature and B) cold and warm days as indexed by mean daily temperature lower or higher than 20 or 30° (shown only for PM).
