https://dds.las.ac.cn/service/document?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1763016994199&signature=19c2437259e28b94b04aad843bcc9d12&articleTitle=Gastrointestinal+Bleeding&articleAuthor=Aurora+D.+Pryor%2C+Theodore+N.+Pappas%2C+Malcolm+Stanley+Branch&publicationTitle=Gastrointestinal+Bleeding&language=&publicationType=1&publishYear=2010&isn=9781441916921&publisher=Springer+New+York