Affiliation: | (1) Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 South Kingshighway, 63110 St. Louis, MO, USA;(2) Department of Surgery, St. Louis Children's Hospital, 400 South Kingshighway, 63110 St. Louis, MO, USA;(3) Digestive Disease Clinical Center, One Barnes Hospital Plaza, 63110 St. Louis, MO, USA |