1. Department of Internal Medicine, Gyeongsang National University Hospital, Jinju, South Korea;
2. Department of Internal Medicine, Changwon Gyeongsang National University Hospital, Changwon, South Korea;
3. Department of Internal Medicine, College of Medicine, Gyeongsang National University, Jinju, South Korea;
4. Institute of Health Science, Gyeongsang National University, Jinju, South Korea