1. Department of Medicine Korea University College of Medicine Seoul Korea
2. Center for Obesity and Metabolic Diseases Korea University Anam Hospital Seoul Korea
3. Division of Foregut Surgery Korea University College of Medicine Seoul Korea
4. Department of Neurology Korea University College of Medicine Seoul Korea
5. Department of Biostatistics College of Medicine The Catholic University of Korea Seoul Korea
6. Department of Biotechnology and Food Science Norwegian University of Science and Technology Trondheim Norway
7. Department of Family Medicine Korea University College of Medicine Seoul Korea