1. Department of Computer Science and Information Engineering, Inha University, Incheon 22212, Korea.
2. Department of Medical Informatics College of Medicine, and Institute of Healthcare Management, The Catholic University of Korea, Seoul 06591, Korea.
3. Department of Information System, Hanyang University, Seoul 04763, Korea.
4. Department of Psychiatry, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea.