Cho Lisa Y, Kim Cheong-Sik, Li Lian, Yang Jae Jeong, Park Boyoung, Shin Aesun, Chang Soung Hoon, Lee Kun-Sei, Kim Hyeongsu, Yoo Keun-Young, Park Sue K
Department of Preventive Medicine, Seoul National University College of Medicine, Jongno-Gu, Seoul, Korea.
Ann Epidemiol. 2009 Sep;19(9):644-6. doi: 10.1016/j.annepidem.2009.04.011.