1. 1 Department of Psychiatry, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
2. 2 Department of Medical Informatics, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
3. 3 Department of Industrial & Management Engineering, Pohang University of Science and Technology, Pohang, Republic of Korea
4. 4 Addiction Research Institute, Department of Psychiatry, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea