Affiliation: | 1.Department of Bio Surgery & Surgical Technology, Imperial College London,St. Mary’s Hospital,London,UK;2.Ethicon Endo-Surgery, Inc.,Cincinnati,USA;3.Department of Surgery,S?dra ?lvsborg Hospital,Bor?s,Sweden;4.Department of Bioengineering and Medical Physics,University College,London,UK;5.Section of Gastroenterology and Hepatology,Dartmouth Medical School,Lebanon,USA |