Choi, Jun Yong; Cheong, Hee-Jin; Chun, Byung Chul; Park, Hye Kyung; Lee, Han Sung; Lee, Hagyung; Kim, Sang Il; Kim, Min Ja; Kim, Sung Soo; Chang, Hyun-Ha, et al.
ArticleIssue Date2009CitationPUBLIC HEALTH REPORTS, v.124, no.6, pp 883 - 888PublisherSAGE PUBLICATIONS INC