Seung Yong Shin, Chul Gab Lee, Han Soo Song, Sul Ha Kim, Hyun Seung Lee, Min Soo Jung, Sang Kon Yoo

Ann Occup Environ Med.2013;25(1):34.  Published online 2013 November 11     DOI: http://dx.doi.org/10.1186/2052-4374-25-34