[1] University at Buffalo,Department of Surgery, The Jacobs School of Medicine
[2] The State University of New York,Department of Surgery
[3] Yale School of Medicine,Department of Surgery
[4] University of Massachusetts Medical School,Department of Medicine
[5] Baystate Medical Center,Department of Surgery
[6] University of Massachusetts Medical School,Department of Surgery
[7] Baystate Medical Center,Department of Surgery
[8] Lowell General Hospital,Gastroenterology Division, Department of Medicine
[9] University of California San Diego School of Medicine,undefined
[10] The Oregon Clinic,undefined
[11] Portland Oregon,undefined
[12] IHU,undefined
[13] Northwestern University Feinberg School of Medicine,undefined
[14] University of Pennsylvania Health System,undefined