1. Department of Internal Medicine, School of Medicine, CHA University, Seongnam, Korea.
2. Department of Laboratory Medicine, School of Medicine, CHA University, Seongnam, Korea.
3. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
4. Department of Laboratory Medicine & Genetics, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Cardiac and Vascular Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.