1 School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA.
2 Orthopedic Center of the Rockies, Fort Collins, CO, USA.
3 School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA; Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO, USA.
4 School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA; Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA. Electronic address: Tammy.Donahue@ColoState.edu.