概述
This is one of a series of statements discussing the use of
GI endoscopy in common clinical situations. The Standards
of Practice Committee of the American Society for
Gastrointestinal Endoscopy (ASGE) prepared this text. In
preparing this guideline, a search of the medical literature
was performed by using PubMed. Studies or reports that
described fewer than 10 patients were excluded from analysis
if multiple series with more than 10 patients addressing
the same issue were available.