Yasser Abdel-Halim

adenoma dysplasia polyp hyperplastic category type resection endoscopic diagnosis optical vienna wasp classification nice jnet sano kudo lesión neoplasia colorectal 2021 ulcerative colitis crohn's disease network meta-analysis bowel damage remission. early acg ecco aibd inflammatory bowel disease exit strategy treat to target early detection de-escalation maintaining remission early remission clinical objectives goal ibd