[1] Dept Oncol Clin Dev, Maebshi, Japan
[2] Gunma Univ, Grad Sch Med, Dept Diagnost Radiol & Nucl Med, Maebashi, Gunma 371, Japan
[3] Gunma Univ, Grad Sch Med, Dept Med & Mol Sci, Gunma, Japan
[4] Gunma Univ, Grad Sch Med, Dept Oncol Clin Dev, Gunma, Japan
[5] Gunma Univ, Grad Sch Med, Dept Diagnost Radiol & Nucl Med, Gunma, Japan