TY - JOUR AU - Kallenberg, F GJ; Bastiaansen, B AJ; Dekker, E TI - Cap-assisted forward-viewing endoscopy to visualize the ampulla of Vater and the duodenum in patients with familial adenomatous polyposis JO - Endoscopy VL - 49 PY - 2017 DO - 10.1055/s-0043-109235 L3 - PubMed-ID: 28558407 SP - 181 EP - 185 ER -