Fig. 1From: Fine particulate matter constituents associated with emergency room visits for pediatric asthma: a time-stratified case–crossover study in an urban areaThe locations of the three particulate matter supersites and the studied hospital in southwestern Taiwan. Note. The Taiwan map outline was adapted from https://webvectormaps.com/taiwan-map-outline-free-blank-vector-map/, which was licensed under the Creative Commons Attribution 4.0 International License. The locations of the three particulate matter supersites and the studied hospital in Kaohsiung was further created using Adobe Photoshop CC 2020Back to article page