Fig. 3From: Effects of short-term exposure to ambient airborne pollutants on COPD-related mortality among the elderly residents of Chengdu city in Southwest ChinaExposure-response curves for associations between concentration increases in each ambient airborne pollutant and COPD-related mortality. Curves for PM2.5, SO2, NO2, CO, and O3 correspond to lag03, lag01, lag02, lag01, and lag02, respectivelyBack to article page