Affiliation: | (1) Department of Hepato-Biliary-Pancreatic Surgery, Tokyo Women’s Medical University, Yachiyo Medical Center, 477-96 Owadashinden, Yachiyo, Chiba 276-8524, Japan;(2) Department of Endoscopy, Tokyo Women’s Medical University, Yachiyo Medical Center, Chiba, Japan;(3) Department of Pathology, Tokyo Women’s Medical University, Yachiyo Medical Center, Chiba, Japan |