[1] Tohoku Univ, Dept Pathol & Histotech, Grad Sch Med, Sendai, Japan
[2] Tohoku Univ, Dept Pathol, Grad Sch Med, Sendai, Japan
[3] Tohoku Bunka Gakuen Univ, Fac Med Sci & Welf, Sendai, Miyagi, Japan
[4] Fukushima Med Univ, Sch Hlth Sci, Dept Radiol Sci, Fukushima, Japan
[5] Tohoku Univ Hosp, Dept Surg, Sendai, Japan
[6] Tohoku Univ, Grad Sch Med, Dept Anat Pathol, Sendai, Japan
[7] Tohoku Univ, Dept Pathol & Hist, Grad Sch Med Sendai, Sendai, Miyagi, Japan