1 Department of Diagnostic Pathology, Seirei Mikatahara Hospital, 3453 Mikataharacho, Hamamatsu, 433-8558, Japan.
2 Department of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan.
3 Department of Tumor Pathology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan.