[1] Jichi Med Univ, Dept Med, Div Endocrinol & Metab, 3311-1 Yakushiji, Shimotsuke, Tochigi, Japan
[2] Jichi Med Univ, Dept Surg, Shimotsuke, Tochigi, Japan
[3] Jichi Med Univ, Dept Pathol, Shimotsuke, Tochigi, Japan
[4] Tohoku Univ, Dept Pathol, Grad Sch Med, Sendai, Miyagi, Japan
[5] Tech Univ Munich, Dept Pathol, Munich, Germany