1. Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, W342 NH 900 North 16th Street, Lincoln, NE 68588-0526.
2. Department of Mechanical Engineering and Materials Science, Yale University, 10 Hillhouse Avenue, New Haven, CT 06520–8267.
3. Center for Advanced Surgical Technology, University of Nebraska Medical Center, 986245 Nebraska Medical Center, Omaha, NE 68198-6245.
4. Department of Surgery, University of Nebraska Medical Center, 986245 Nebraska Medical Center, Omaha, NE 68198-6245.
5. Department of Health Services Research and Administration, University of Nebraska Medical Center, 986245 Nebraska Medical Center, Omaha, NE 68198-6245.