Ethical issues in endoscopy: patient satisfaction, safety in elderly patients, palliation, and relations with industry - Ladas, S D; Novis, B; Triantafyllou, K; Schoefl, R; Rokkas, T; Stanciu, C; Isaacs, P; Willich, S N; Ronn, O; Dremel, H; Livadas, G; Egan, B J; Boyacioglu, S; Selimovic, A; Pulanic, R; Karagiannis, J A; Van Vooren, J P; Kouroumalis, E; O’Morain, C; Nowak, A; Deviere, J; Malfertheiner, P; Axon, A (Endoscopy, 2007)