1. Third Department of Internal Medicine; Sapporo Medical University School of Medicine; Sapporo; Japan
2. Division of Glycopathology, Institute of Molecular Biomembranes and Glycobiology; Tohoku Pharmaceutical University; Miyagi; Sendai; Japan
3. Department of Biochemistry; Sapporo Medical University School of Medicine; Sapporo; Japan
4. Department of Chemistry; Sapporo Medical University School of Medicine; Sapporo; Japan
5. Second Department of Surgery; Sapporo Medical University School of Medicine; Sapporo; Japan
6. Clinical Pathology; Sapporo Medical University School of Medicine; Sapporo; Japan