European High Resolution Working Group on Colorectum Cancer: Belgium: L Van Eycken, K Henau (Belgian Cancer Registry); Bulgaria: T Grozeva, Z Valerianova, (Bulgarian Cancer Registry); Estonia: K Innos, M Mägi (Estonia Cancer Registry); France: V Bouvier, G Launoy (Calvados Digestive Cancer Registry); Nousbaum JB (Finistère Digestive Cancer Registry); AM Bouvier, V Jooste (Digestive Cancer Registry of Burgundy, FRANCIM); Germany: V Babaev, A. Katalinic (Germany-Schleswig-Holstein Cancer Registry); Iceland: EJ Ólafsdóttir, L Tryggvadóttir, (Iceland – National Cancer Registry); Italy: P Baili, S Bonfarnuzzo, G Moretti, M Sant (Fondazione IRCCS Istituto Nazionale dei Tumori, Milan); C Cirilli, G Carrozzi (Modena Cancer Registry); E Spata, R Tumino (Ragusa Cancer Registry); P Giorgi Rossi, M Vicentini (Reggio Emilia Cancer Registry, IRCCS AUSL ASMN); F Stracci, F Bianconi (Umbria Cancer Registry); P Contiero, G Tagliabue (Varese Province Cancer Registry, Fondazione IRCCS Istituto Nazionale dei Tumori); Poland: W Kycler, M Oko (Greater Poland Cancer Registry); P Macek, J. Smok-Kalwat (Kielce Cancer Registry); M Bielska-Lasota (National Institute of Public Health-NIH, Warsaw); Portugal: MJ Bento, A Lourenço, J Rodrigues (Northern Portugal Cancer Registry); A Mayer-da-Silva, Rodriguez (Southern Portugal Cancer Registry); Slovenia: V Zadnik (National Cancer Registry), K Jarm (Institute of Oncology Ljubljana); Spain: E Almar, A Mateos (Albacete Castilla-La Mancha Cancer Registry); J Bidaurrazaga, M de la Cruz, (Basque Country Cancer Registry, CIBERESP); C Alberich, A Torrella-Ramos (Castellón-Valencia Cancer Registry); JM Díaz García, AI Marcos-Navarro (Cuenca Cancer Registry); C Carmona-Garcia, R Marcos-Gragera, (Girona Cancer Registry CIBERESP, IDIBGI); M Rodríguez-Barranco MJ Sánchez-Pérez (Granada Cancer Registry, EASP, CIBERESP, ibs.GRANADA, Universidad de Granada); E Ardanaz, M Guevara (Navarra Cancer Registry, CIBERESP); Switzerland: E. Rapiti, E Fournier (Geneva Cancer Registry, University of Geneva).