title: Letter: histological assessment of disease activity in ulcerative colitis--the problem of score evaluation and validation; authors' reply.
authors.affiliation: Department of Pathology, University Hospital of Reims, Reims, France.|INSERM U954 and Department of Hepato-Gastroenterology, University Hospital of Nancy, Lorraine University, Vandoeuvre-lès-Nancy, France.
authors.forename: A Marchal
authors.initials: AM
authors.lastname: Bressenot
authors.affiliation: INSERM U954 and Department of Hepato-Gastroenterology, University Hospital of Nancy, Lorraine University, Vandoeuvre-lès-Nancy, France. peyrinbiroulet@gmail.com.
authors.forename: L
authors.initials: L
authors.lastname: Peyrin-Biroulet
mesh_terms: D003093:Colitis, Ulcerative / Q000473:pathology*; D006801:Humans; D008297:Male