1. Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
2. Department of Radiology, Chiba University Hospital, Chiba, Japan
3. Chiba University School of Medicine, Chiba, Japan
4. Division of Laboratory Medicine, Chiba University Hospital, Chiba, Japan
5. Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center, Graduate School of Medicine, Osaka University, Osaka, Japan