Gastroenterology Department,Hospital del Mar,Barcelona 08003,Spain;
IMIM(Hospital del Mar Medical Research Institute),Barcelona 08003,Spain;
Department of Medicine,Autonomous University of Barcelona,Barcelona 08003,Spain;
Pompeu Fabra University,Barcelona 08003,Spain;
Pathology Department,Hospital del Mar,Barcelona 08003,Spain.;
Colonoscopy; Narrow; band; imaging; Endoscopic; mucosal; resection;