1. Department of Internal Medicine, Gangnam CHA Medical Center, CHA University, School of Medicine
2. Division of Cardiology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
3. Department of Internal Medicine, Eunpyeong Teun Teun Hospital
4. Nutrition and Metabolism Unit, IDS Building, Southampton General Hospital, (University of Southampton) and Southampton National Institute for Health Research Biomedical Research Centre