Retrospective study of technical aspects and complications of endoscopic submucosal dissection for laterally spreading tumors of the colorectum - Toyonaga, T.; Man-i, M.; Fujita, T.; East, J. E.; Nishino, E.; Ono, W.; Morita, Y.; Sanuki, T.; Yoshida, M.; Kutsumi, H.; Inokuchi, H.; Azuma, T. (Endoscopy, 2010)