1. Department of Medicine Korea University College of Medicine Seoul South Korea
2. Center for Obesity and Metabolic Diseases Korea University Anam Hospital Seoul South Korea
3. Division of Foregut Surgery Korea University College of Medicine Seoul South Korea
4. BK21 FOUR Community‐Based Intelligent Novel Drug Discovery Education Unit, College of Pharmacy and Research Institute of Pharmaceutical Sciences Kyungpook National University Daegu South Korea
5. Department of Statistics Daegu University Gyeongbuk South Korea