Yoojun Song, Chunhui Suh, Shin-Ae Kim, Nami Kim, Sung-Min Kim, Seong-Wook Jeong, Se-Yeong Kim, Kun-Hyung Kim, Jeong-Ho Kim, Byung-Chul Son, Chae-Kwan Lee, Jong-Tae Lee

Ann Occup Environ Med.2014;26(1):38.  Published online 2014 December 1     DOI: http://dx.doi.org/10.1186/s40557-014-0038-8