1. Department of Psychiatry, Dankook University College of Medicine, Cheonan, Korea
2. Department of Neurology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea
3. Department of Psychiatry, Dankook University Hospital, Cheonan, Korea
4. Department of Psychology, College of Public Human Resources, Dankook University, Cheonan, Korea
5. Department of Preventive Medicine, Dankook University College of Medicine, Cheonan, Korea
6. Environmental Health Center, Dankook University Medical Center, Cheonan, Korea