1. 1Department of Preventive Medicine, College of Medicine, Catholic University of Korea, Seoul, Korea
2. 2Department of Psychiatry, College of Medicine, Catholic University of Korea, Seoul, Korea
3. 3Departments of Psychiatry and Neuroscience and Child Study Center, Yale University, New Haven, CT, USA
4. 4Connecticut Council on Problem Gambling, Wethersfield, CT, USA
5. 5Connecticut Mental Health Center, New Haven, CT, USA