[1] Shiga Univ Med Sci Hosp, Canc Ctr, Otsu, Shiga, Japan
[2] Shiga Univ Med Sci, Dept Surg, Otaru, Hokkaido, Japan
[3] Hino Mem Hosp, Dept Surg, Hino, Tokyo, Japan
[4] Shiga Med Univ Sci, Dept Surg, Otaru, Hokkaido, Japan
[5] Shiga Univ Med Sci, Dept Comprehens Surg, Otaru, Hokkaido, Japan