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Characterization of Perineural Invasion As a Component of Colorectal Cancer StagingUeno, Hideki; Shirouzu, Kazuo; Eishi, Yoshinobu; Yamada, Kazutaka; Kusumi, Takaya; Kushima, Ryoji; Ikegami, Masahiro; Murata, Akihiko; Okuno, Kiyotaka; Sato, Toshihiko; Ajioka, Yoichi; Ochiai, Atsushi; Shimazaki, Hideyuki; Nakamura, Takahiro; Kawachi, Hiroshi; Kojima, Motohiro; Akagi, Yoshito; Sugihara, Kenichi · The American Journal of Surgical Pathology · 2013