1. Department of Pathology; Tokai University School of Medicine; Isehara; Japan
2. Department of Hematology; Tokai University School of Medicine; Isehara; Japan
3. Department of Pathology; Fukushima Medical University School of Medicine; Fukushima; Japan
4. Department of Pathology; Okayama University Graduate School of Medicine; Dentistry and Pharmaceutical Sciences; Okayama; Japan
5. Department of Biochemistry; Tohoku University School of Medicine; Sendai; Japan