TY - JOUR AU - Dumonceau, J M; Hassan, C; Riphaus, A TI - European Society of Gastrointestinal Endoscopy (ESGE) Guideline Development Policy JO - Endoscopy VL - 44 PY - 2012 DO - 10.1055/s-0031-1291747 SP - 626 EP - 629 N1 - et al. ER -