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Yi O, Kim H, Ha E.Yi O, et al. Among authors: ha e.Environ Res. 2010 Jan;110(1):55-61. doi: 10.1016/j.envres.2009.10.004.Environ Res. 2010.PMID: 19878932
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Park H, Lee B, Ha EH, Lee JT, Kim H, Hong YC.Park H, et al.Arch Pediatr Adolesc Med. 2002 Dec;156(12):1235-9. doi: 10.1001/archpedi.156.12.1235.Arch Pediatr Adolesc Med. 2002.PMID: 12444836
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