1. Department of Human Pathology; Gunma University Graduate School of Medicine; Maebashi Japan
2. Department of Pathology; Gunma University Hospital; Maebashi Japan
3. Department of Neurosurgery; Saku Central Hospital; Saku Japan
4. Department of Clinical Pathology; Saku Central Hospital; Saku Japan
5. Department of Molecular Pathology; Shinshu University Graduate School of Medicine; Matsumoto Japan