1. Department of Pediatrics, College of Medicine, Hanyang University, Seoul, Korea.
2. Database and Bioinformatics Laboratory, College of Electrical and Computer Engineering, Chungbuk National University, Cheongju, Korea.
3. Department of Thoracic and Cardiovascular Surgery, College of Medicine, Chungbuk National University, Cheongju, Korea.
4. Biostatistics Consulting and Research Lab, College of Medicine, Hanyang University, Seoul, Korea.