1. Department of Psychiatry, Asan Medical Center, Seoul, Korea.
2. Department of Psychiatry, Chamjoeun Hospital, Gwangju, Korea.
3. Department of Psychiatry, Inha University Hospital, Incheon, Korea.
4. Department of Statistics and Data Science, Korea National Open University, Seoul, Korea.
5. Department of Psychiatry, University of Ulsan College of Medicine, Seoul, Korea.