International consensus on methodological issues in standardization of fecal calprotectin measurement in inflammatory bowel diseases - D'Amico, Ferdinando (Humanitas University. Department of Biomedical Sciences) ; Rubin, David T. (University of Chicago. Department of Medicine) ; Kotze, Paulo Gustavo (Catholic University or Paraná) ; Magro, Fernando (Centro Hospitalar São João) ; Siegmund, Britta (Charité - Universitätsmedizin Berlin) ; Kobayashi, Taku (Kitasato University. Kitasato Institute Hospital) ; Olivera, Pablo A. (Centro de Educación Médica e Investigaciones Clínicas (Buenos Aires)) ; Bossuyt, Peter (Imelda General Hospital) ; Pouillon, Lieven (Imelda General Hospital) ; Louis, Edouard (Liège University Hospital (Bèlgica)) ; Domènech, Eugeni (Institut Germans Trias i Pujol. Hospital Universitari Germans Trias i Pujol) ; Ghosh, Subrata (University of Birmingham) ; Danese, Silvio (Humanitas University. Department of Biomedical Sciences) ; Peyrin-Biroulet, Laurent (University of Lorraine) ; Universitat Autònoma de Barcelona. Departament de Medicina