1. Department of Internal Medicine, Yeungnam University Medical Center, Daegu 42415, Republic of Korea
2. Department of Internal Medicine, College of Medicine, Yeungnam University, Daegu 42415, Republic of Korea
3. Departments of Surgery, Yeungnam University Medical Center, Daegu 42415, Republic of Korea
4. Department of Pathology, College of Medicine, Yeungnam University, Daegu 42415, Republic of Korea