*Department of Preventive Medicine, Ewha global challenge project for Medicine, Ewha Womans University, Seoul, Republic of Korea; †Department of Preventive Medicine, Dankook University College of Medicine, Dankook, Republic of Korea; ‡Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of Korea; and §Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.
Acknowledgment: This study was supported by the Ministry of Environment, Republic of Korea.
Abstracts published in Epidemiology have been reviewed by the organizations of Epidemiology. Affliate Societies at whose meetings the abstracts have been accepted for presentation. These abstracts have not undergone review by the Editorial Board of Epidemiology.