1. Department of Mathematics, Center for Quantitative Sciences in Biomedicine, Center for Research in Scientific Computation, North Carolina State University , Raleigh, NC, USA.
2. Max Planck Institute for Biochemistry , Martinsried, Germany.
3. Department of Molecular and Cellular Biology, The University of Arizona , Tucson, AZ, USA.
4. Department of Applied Mathematics, School of Natural Sciences, University of California , Merced, CA, USA.