[1] Osaka Prefectural Habikino Hosp, Dept Internal Med, Habikino, Osaka 5838588, Japan
[2] Osaka Prefectural Habikino Hosp, Dept Surg, Habikino, Osaka 5838588, Japan
[3] Osaka Prefectural Habikino Hosp, Dept Pathol, Habikino, Osaka 5838588, Japan
[4] Izumisano Municipal Hosp, Div Resp, Izumisano, Osaka 5988577, Japan