1. Department of Internal Medicine Cha Bundang Medical Center Cha University Seongnam Korea
2. Department of Internal Medicine School of Medicine Kyungpook National UniversityKyungpook National University Hospital Daegu Korea
3. Department of Internal Medicine Yonsei University College of Medicine Seoul Korea
4. Yonsei Liver Center Severance HospitalYonsei University Health System Seoul Korea
5. Institute of GastroenterologyYonsei University College of Medicine Seoul Korea
6. Big Data Center Department of Statistics Yonsei University Wonju College of Medicine Wonju‐si Korea