Affiliation: | 1.Division of Integrative Systems and Design,University of Michigan, Ann Arbor, MI48109, USA;2.Department of Mechanical Engineering,University of Michigan, Ann Arbor, MI48109, USA;3.Department of Internal Medicine, Divisionof Gastroenterology, University ofMichigan, Ann Arbor, MI 48109, USA;4.Department of Biomedical Engineering,University of Michigan, Ann Arbor, MI48109, USA |