Department of Pathology, Ibaraki Prefectural Central Hospital and Cancer Center, 6528 Koibuchi, Tomobe-machi, Ibaraki 309-1793, Japan, JP
Satoshi Inagawa, Jiro Shimazaki, Masao Hori & Masayuki Itabashi
Department of Surgery, Ibaraki Prefectural Central Hospital and Cancer Center, Ibaraki, Japan, JP
Fuyo Yoshimi
Department of Surgery, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan, JP
Shinya Adachi, Toru Kawamoto & Katashi Fukao