[1] Kishiwada Tokushukai Hosp, Dept Radiol, Kishiwada, Osaka 5968522, Japan
[2] Kishiwada Tokushukai Hosp, Dept Internal Med, Kishiwada, Osaka 5968522, Japan
[3] Kishiwada Tokushukai Hosp, Dept Pathol, Kishiwada, Osaka 5968522, Japan
[4] Kishiwada Tokushukai Hosp, Dept Surg, Kishiwada, Osaka 5968522, Japan
[5] Wakayama Med Univ, Dept Radiol, Wakayama 6418510, Japan