1. Department of Rehabilitation Medicine, Pusan National University, School of Medicine, Busan, Korea.
2. Department of Pediatrics, Pusan National University, School of Medicine, Busan, Korea.
3. Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
4. Department of Laboratory Medicine, Pusan National University, School of Medicine, Busan, Korea.
5. Medical Research Institute, Pusan National University, Busan, Korea.