1Department of Preventive Medicine and Institute of Occupational Medicine, Wonju College of Medicine, Yonsei University. chang@wonju.yonsei.ac.kr
2Department of Preventive and Occupational Medicine, College of Medicine Pusan University.
3Department of Occupational and Environmental Medicine, Pochon CHA University, and Kumi Cha Hospital.
4Department of Preventive Medicine, College of Medicine Chosun University.
5Department of Occupational Medicine, College of Medicine Chosun University.
6Korean Women's Development Institute.
7Department of Family Medicine, Hallym University College of Medicine.
8Department of Preventive Medicine, College of Medicin, Kangwon National University
9Masan Samsung Hospital.
10Department of Occupational and Environmental Medicine, Pusan Paik Hospital, Inje university.
11Department of Occupational and Environmental Medicine, College of Medicine, Donga University.
12Department of Preventive Medicine, College of Medicine, Konkuk University.
13Department of Occupational and Environmental Medicine, College of Medicine, Dankook University.
14Department of Preventive Medicine, College of Medicine, Ajou University.
15Department of Neuropsychiatry and Stress Research Institute, Inje University Seoul Paik Hospital.
16Department of Preventive Medicine, College of Medicine, Eulji University.
17Department of Preventive Medicine, College of Medicine, Ewha Woman's University.
18Department of Preventive Medicine, College of Medicine, Dankook University.
19Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency. JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/