1. Department of Pediatrics, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.
2. Department of Ophthalmology, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.
3. Department of Urology, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.
4. Department of Pathology, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.