Second European evidence-based consensus on the diagnosis and management of ulcerative colitis: Special situations

Second European evidence-based consensus on the diagnosis and management of ulcerative colitis: Special situations Gert Van Assche⁎, Axel Dignass⁎⁎, Bernd Bokemeyer, Silvio Danese, Paolo Gionchetti, Gabriele Moser, Laurent Beaugerie, Fernando Gomollon, Winfried Hauser, Klaus Herrlinger, Bas Oldenburg, Julian Panes, Francisco Portela, Gerhard Rogler, Jurgen Stein, Herbert Tilg, Simon Travis, James O. Lindsay