1Dongguk University, College of Medicine, Korea.
2Seoul National University, School of Public Health, Korea.
3Korean Association of Work and Health, Korea.
4Ewha Womans University, College of Medicine, Korea.
5Hallym University, College of Medicine, Korea.
6Industrial Safety and Health Research Institute, Korea Industrial Safety Corporation, Korea.
7Soonchunhyang Univ, Dept. of Nursing, Korea.
8Sinheung JR College, Dept. of Nursing, Korea.
9Inha Univ, Hospital Dept. of Occup. Medicine, Korea.