1. Department of Internal Medicine, Digestive Disease Center Inha University School of Medicine Incheon South Korea
2. Department of Biomedical Engineering, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
3. Department of Gastroenterology, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
4. Department of Clinical Epidemiology and Biostatistics University of Ulsan College of Medicine, Asan Medical Center Seoul South Korea
5. Department of Internal Medicine Chung‐Ang University, College of Medicine Seoul South Korea