1. Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea.
2. Department of Internal Medicine, Daegu Catholic University Medical Center, Catholic University of Daegu School of Medicine, Daegu, Korea.
3. Biostatistics Center, School of Medicine, Kyungpook National University, Daegu, Korea.
4. New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Korea.