1 Program in Applied Mathematical and Computational Sciences, University of Iowa , Iowa City, IA , USA.
2 Department of Orthopaedics and Rehabilitation, University of Iowa , Iowa City, IA , USA ; Department of Biomedical Engineering, University of Iowa , Iowa City, IA , USA.
3 Program in Applied Mathematical and Computational Sciences, University of Iowa , Iowa City, IA , USA ; Department of Orthopaedics and Rehabilitation, University of Iowa , Iowa City, IA , USA ; Department of Mathematics, University of Iowa , Iowa City, IA , USA.