Consensus report of the 2nd International Conference on Double Balloon Endoscopy - Pohl, J; Blancas, J M; Cave, D; Choi, K Y; Delvaux, M; Ell, C; Gay, G; Jacobs, M A J M; Marcon, N; Matsui, T; May, A; Mulder, C J J; Pennazio, M; Perez-Cuadrado, E; Sugano, K; Vilmann, P; Yamamoto, H; Yano, T; Zhong, J J (Endoscopy, 2008)