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. 2018 Mar 6;126(3):037002. doi: 10.1289/EHP2223

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EHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted.

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Map marking study sites, namely, Seoul, Incheon, Daegu, Busan, Tokyo, Nagoya, Osaka, Taipei, Taichung, and Kaohsiung. — Study location of 10 cities in South Korea (KR), Japan (JP), and Taiwan (TW).