title: Chromoendoscopy: what is its true value for ulcerative colitis surveillance?
authors.affiliation: Endoscopic Unit, I. Med. Klinik und Poliklinik, Johannes Gutenberg-Universität, Mainz, Germany. kiesslic@mail.uni-mainz.de
authors.forename: Ralf
authors.initials: R
authors.lastname: Kiesslich