1. Department of Internal Medicine, Keiyu Hospital, Yokohama, Japan
2. Department of Radiology, Saiseikai Central Hospital, Tokyo, Japan
3. Department of Community Health, Tokai University School of Medicine, Yokohama, Japan
4. Department of Internal Medicine, Saiseikai Central Hospital, Tokyo, Japan
5. Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Yokohama, 220-0012, Japan