[1] Madigan Army Medical Center,Division of Colon and Rectal Surgery
[2] Pennsylvania Hospital / Hospital of the University of PA,Division of Colorectal Surgery
[3] University Hospitals,Colon and Rectal Surgery, Department of Surgery
[4] Case Medical Center,College of Medicine
[5] University of Iowa,Harvard Medical School
[6] Central Michigan University,Department of Surgery
[7] Massachusetts General Hospital,undefined
[8] University of California,undefined
[9] Irvine School of Medicine,undefined