1. Department of Adolescent Psychiatry, National Center for Child and Adolescent Psychiatry, Seoul National Hospital, Seoul, Korea
2. Department of Preventive Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
3. Department of Psychiatry, Ewha Womans University, College of Medicine, Seoul, Korea
4. Department of Preventive Medicine, Dankook University, College of Medicine, Cheonan, Korea
5. Department of Pediatrics, University of Ulsan, College of Medicine, Ulsan, Korea
6. Department of Preventive Medicine, Seoul National University, College of Medicine, Seoul, Korea
7. Department of Nutritional Science and Food Management, Ewha Womans University, College of Health Sciences, Seoul, Korea
8. Division of Child and Adolescent Psychiatry, Department of Psychiatry, Seoul National University, College of Medicine, Seoul, Korea