1. Department of Preventive Medicine, Institute of Occupational and Environmental Medicine, Wonju College of Medicine, Yonsei University, Korea.
2. Department of Preventive and Occupational Medicine, School of Medicine, Pusan National University, Korea.
3. Korean Women's Institute, Ewha Womans University, Korea.
4. Department of Preventive Medicine, Industrial Medical Center, The Catholic University of Korea, Korea.
5. Graduate School of Public Health, Yonsei University, Korea.
6. National Academy of Agricultural Science, Rural Development Administration, Korea.
7. Korean Health Promotion Foundation, Korea.