Network Dynamics and Simulation Science Laboratory, Virginia Bioinformatics Institute, Blacksburg, VA 24061, USA;Department of Computer Science, University at Albany - SUNY, Albany, NY 12222, USA;Network Dynamics and Simulation Science Laboratory, Virginia Bioinformatics Institute, Blacksburg, VA 24061, USA;Department of Computer Science, University at Albany - SUNY, Albany, NY 12222, USA;Department of Computer Science, University at Albany - SUNY, Albany, NY 12222, USA;Department of Computer Science, University at Albany - SUNY, Albany, NY 12222, USA;Department of Computer Science, University of Missouri-Rolla, Rolla, MO 65409, USA