1. Department of Internal Medicine, Division of Gastroenterology, University of Michigan, Ann Arbor, Michigan, USA
2. Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA
3. Department of General Surgery, First Affiliated Hospital, Medical School of Xi’an Jiaotong University, People’s Republic of China
4. Department of Surgery, Section of Thoracic Surgery, University of Michigan, Ann Arbor, Michigan, USA
5. Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
6. University of Michigan Cancer Center, University of Michigan, Ann Arbor, Michigan, USA
7. Olympus Medical Systems Corp., Tokyo, Japan