Dong-Uk Park, Hyae-Jeong Byun, Sang-Jun Choi, Jee-Yeon Jeong, Chung-Sik Yoon, Chi-Nyon Kim, Kwon-Chul Ha, Doo-Yong Park

Korean J Occup Environ Med.2011;23(3):333-342.   Published online 2011 September 30     DOI: http://dx.doi.org/10.35371/kjoem.2011.23.3.333