Young-Seoub Hong, Dae-Seon Kim, Seung-Do Yu, Seong-Hwan Kim, Jong-Kuk Kim, Yu-Mi Kim, Jae-Ho Yu, Ji-Hyun Jung, Byoung-Gwon Kim

Ann Occup Environ Med.2013;25(1):18.  Published online 2013 September 24     DOI: http://dx.doi.org/10.1186/2052-4374-25-18