High definition colonoscopy combined with i-Scan is superior in the detection of colorectal neoplasias compared with standard video colonoscopy: a prospective randomized controlled trial - Hoffman, A.; Sar, F.; Goetz, M.; Tresch, A.; Mudter, J.; Biesterfeld, S.; Galle, P. R.; Neurath, M. F.; Kiesslich, R. (Endoscopy, 2010)