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Our understanding of the biology of several intestinal parasites has progressed considerably in the past year, especially in the area of molecular biology. Information from molecular and genetic analyses has been used increasingly to improve understanding of pathogenesis, to apply improved diagnostic methods, and to seek new vaccination strategies. There(More)
BACKGROUND The optimal endoscopic treatment for anastomotic biliary strictures after deceased donor liver transplantation is undefined. Endoscopic therapy with conventional methods of biliary dilation and stent placement has been successful but often requires prolonged therapy. OBJECTIVE To determine the outcomes of an aggressive endoscopic approach that(More)
BACKGROUND Models based on artificial neural networks (ANN) are useful in predicting outcome of various disorders. There is currently no useful predictive model for risk assessment in acute lower-gastrointestinal haemorrhage. We investigated whether ANN models using information available during triage could predict clinical outcome in patients with this(More)
BACKGROUND Impaired drainage of the pancreatic duct is one of the possible triggers for post-ERCP acute pancreatitis. The aim of this meta-analysis was to determine whether temporary stent placement across the main pancreatic-duct orifice lowers the frequency of post-ERCP acute pancreatitis in patients at high risk for this complication. METHODS Two(More)
This document presents the official recommendations of the American Gastroenterological Association (AGA) Institute on "Evaluation and Management of Occult and Obscure Gastrointestinal Bleeding." It was approved by the Clinical Practice and Economics Committee on March 12, 2007, and by the AGA Institute Governing Board on May 19, 2007. This medical position(More)
OBJECTIVES Colonoscopy has an appreciable miss rate for adenomas and colorectal cancer. The goal of advanced endoscopic imaging is to improve lesion detection. Compared with standard definition, high-definition (HD) colonoscopes have the advantage of increased field of visualization and higher resolution; narrow band imaging (NBI) utilizes narrow band(More)
Non-dysplastic mucosa (ND-) in Barrett’s esophagus (BE) shows clonal molecular aberrations, loss of cell cycle control, and other features of “neoplasia.” These changes occur prior to morphologic expression of neoplasia (dysplasia). Morphologic evaluation of dysplasia is fraught with error, and, as a result, often leads to false-negative and false-positive(More)
BACKGROUND Living-donor liver transplantation (LDLT) has emerged as a viable strategy in an era of organ shortage. However, biliary strictures are a common complication of LDLT, and these strictures frequently require surgical revision after unsuccessful endoscopic therapy. The optimal endoscopic treatment for anastomotic biliary strictures (ABSs) after(More)