[1] Oita Univ, Dept Radiol, Fac Med, Oita 8795593, Japan
[2] Oita Univ, Dept Mol Pathol, Fac Med, Oita 8795593, Japan
[3] Oita Univ, Dept Gastroenterol & Pediat Surg, Fac Med, Oita 8795593, Japan
[4] Oita Red Cross Hosp, Dept Radiol, Oita 8700033, Japan
[5] Oita Red Cross Hosp, Dept Surg, Oita 8700033, Japan
[6] Oita Red Cross Hosp, Dept Anat Pathol, Oita 8700033, Japan