TY - JOUR AU - Thiruvengadam, S S; Lopez, R; O'Malley, M TI - Spigelman stage IV duodenal polyposis does not precede most duodenal cancer cases in patients with familial adenomatous polyposis JO - Gastrointest Endosc VL - 89 PY - 2019 DO - 10.1016/j.gie.2018.07.033 L3 - PubMed-ID: 30081000 SP - 345 EP - 354.e2 N1 - et al. ER -