1. Department of Surgery, School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea
2. Department of Oriental Internal Medicine, College of Oriental Medicine, Daegu Haany University, Daegu, Republic of Korea
3. Comprehensive and Integrative Medicine Institute, Daegu, Republic of Korea
4. Department of Surgery, Raphael Hospital, Daegu, Republic of Korea
5. Department of Medical Statistics, School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea