Pre-Study protocol Weight-loss Endoscopy Trial (WET): a multi-center, randomized, controlled trial comparing weight loss in endoscopically implanted duodenal-jejunal bypass liners vs. intragastric balloons vs. a sham procedure - Hollenbach, M; Schepp, W; Grundling, F; Seufert, J; Stein, J; Rösch, T; Aberle, J; Feisthammel, J; Mössner, J; Prettin, C; Petroff, D; Hoffmeister, A (Zeitschrift für Gastroenterologie, 2017)