1. Department of Mechanical and Material Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588
2. Department of Mechanical Engineering, University of Colorado-Boulder, Boulder, CO 80302
3. Institutional Animal Care Program, University of Nebraska-Lincoln, Lincoln, NE 68583
4. School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583
5. Department of Surgery, University of Nebraska Medical Center, Omaha, NE 68198