[1] Ishikawa Prefectural Cent Hosp, Dept Diagnost Pathol, Kanazawa, Ishikawa, Japan
[2] Ishikawa Prefectural Cent Hosp, Dept Gastroenterol Surg, Kanazawa, Ishikawa, Japan
[3] Ishikawa Prefectural Cent Hosp, Dept Haematol, Kanazawa, Ishikawa, Japan
[4] Nagoya Daiichi Hosp, Aichi Med Ctr, Japanese Red Cross, Dept Pathol, Nagoya, Aichi, Japan