1. Noyes-Giannestras Biomechanics Laboratory, Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, OH 45221-0048
2. Current Product Engineering, General Motors Technical Center, Warren, MI 48090–91010
3. Department of Mathematics and Statistics, University of Missouri-Rolla, Rolla, MO 65401
4. Department of Quantitative Analysis and Information Systems, University of Cincinnati, Cincinnati, OH 45221-0130