Affiliation: | 1. University Medical Center at Princeton, Princeton, New Jersey;2. University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania;1. Boston University School of Medicine, 715 Albany Street, Boston, MA 02118, USA;2. Section of Gastroenterology, Boston Medical Center, 85 East Concord Street, 7th Floor, Boston, MA 02118, USA;1. From the Clinic Hirslanden, University Hospital, Berne, Switzerland;2. Medical Outpatient Department, University Hospital, Berne, Switzerland |