1. Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
2. Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
3. Department of Radiology, Kishiwada City Hospital, Kishiwada, Japan
4. Department of Pathology, Institute of Health Biosciences, The University of Tokushima Graduate School of Medicine, Tokushima, Japan