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. 2018 May 17;15(5):1006. doi: 10.3390/ijerph15051006

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Map of Taean County and comparison of the coastal areas (a, b, and c) in Korea. (A) Comparison areas, “a”: Same province and same coastal area, “b”: Neighboring province and same coastal area, and “c”: Different province and different coast. The areas for comparison were selected based on their similarities to Taean County in terms of their characteristics and population size. (B) Taean County according to exposure level. I: Sowon, II: Wonbuk, III: Iwon, IV: Geunheung, V: Taean-eup, VI: Nam, VII: Anmyeon, and VIII: Gonam. The maps were drawn using Google maps (2018) [35] and ggplot2 in R package [36].