1. Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, 11100 Euclid Ave, Cleveland, OH 44106.
2. Department of Medicine, Division of Gastroenterology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH.
3. Department of Surgery, Division of Surgical Oncology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH.