1. Department of Medicine and Biological Science, Gunma University Graduate School of Health Sciences, 3‐39‐22 Showa‐machi, Maebashi, Gunma, Japan
2. Education and Research Support Center, Gunma University Graduate School of Health Sciences, 3‐39‐22 Showa‐machi, Maebashi, Gunma, Japan
3. Department of Bioimaging Information Analysis, Gunma University Graduate School of Health Sciences, 3‐39‐22 Showa‐machi, Maebashi, Gunma, Japan
4. Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, 3‐39‐22 Showa‐machi Maebashi, Gunma, Japan
5. Department of Anesthesiology and Intensive Care Medicine, Gunma University Graduate School of Medicine, Gunma University Graduate School of Health Sciences, 3‐39‐22 Showa‐machi, Maebashi, Gunma, Japan
6. Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Health Sciences, 3‐39‐22 Showa‐machi, Maebashi, Gunma, Japan
7. Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institute of Health, Bethesda, MD, USA