FRONTIER

1. Colorectal cancer screening and surveillance in patients with inflammatory bowel disease in 2021

MINIREVIEWS

1. Viral hepatitis: Innovations and expectations

ORIGINAL ARTICLE

1. Effect of Bacillus subtilis, Enterococcus faecium, and Enterococcus faecalis supernatants on serotonin transporter expression in cells and tissues
2. Connective tissue growth factor expression hints at aggressive nature of colorectal cancer
3. Abnormal liver chemistries as a predictor of COVID-19 severity and clinical outcomes in hospitalized patients

CASE REPORT

1. Simultaneous endoscopic and video-assisted retroperitoneal debridement in walled-off pancreatic necrosis using a laparoscopic access platform: Two case reports
2. Curative resection with endoscopic submucosal dissection of early gastric cancer in Helicobacter pylorinegative Ménétrier’s disease: A case report

LETTER TO THE EDITOR

1. Artificial intelligence model validation before its application in clinical diagnosis assistance
2. Machine learning models and over-fitting considerations