1. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
2. Department of General Surgery, Hanyang University College of Medicine, Seoul, Korea
3. Department of Pathology, Hanyang University College of Medicine, Seoul, Korea
4. Department of Biochemistry and Molecular Biology, Hanyang University College of Medicine, Seoul, Korea
5. Department of Internal Medicine, Hallym University College of Medicine, Hwaseong, Korea