Sung Joohon, Cho Sung-Il, Song Yun-Mi, Lee Kayoung, Choi Eun-Young, Ha Mina, Kim Jihae, Kim Ho, Kim Yeonju, Shin Eun-Kyung, Kim Yoon-Hee, Yoo Keun-Young, Park Chan, Kimm Kuchan
Int J Epidemiol. 2006 Apr;35(2):488-90. doi: 10.1093/ije/dyi294. Epub 2006 Jan 19.