1. Department of Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan;
2. Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan;
3. Department of Biostatistics, Graduate School of Medicine, Hokkaido University, Hokkaido, Japan;
4. Department of Nephrology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan;
5. Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan;
6. Matsushita Memorial Hospital, Osaka, Japan