1. Department of Pediatrics, Ilsin Christian Hospital, Busan, Korea.
2. Department of Pediatrics, Dong-A University College of Medicine, Busan, Korea.
3. Department of Pediatrics, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
4. Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.
5. Department of Psychiatry, Dong-A University College of Medicine, Busan, Korea.