1. Department of Electrical and Computer Engineering, University at Albany, State University of New York, USA
2. School of Biomedical Engineering, Colorado State University, USA
3. Department of Electrical and Computer Engineering, University at Albany, State University of New York, Albany, NY, USA
4. Department of Mathematics and School of Biomedical Engineering, Colorado State University, USA
5. Department of Biomedical Engineering, Rensselaer Polytechnic Institute, USA
6. Department of Mathematical Sciences, Rensselaer Polytechnic Institute, USA