[1] Virginia Polytech Inst & State Univ, Virginia Bioinformat Inst, Blacksburg, VA 24061 USA
[2] Boston Univ, Dept Biomed Engn, Appl Biodynam Lab, Boston, MA 02215 USA
[3] Rutgers State Univ, Bio Ma PS & DIMACS Inst, Piscataway, NJ 08854 USA
[4] Univ Manchester, Dept Comp Sci, Manchester M13 9PL, Lancs, England
[5] Univ Manchester, Manchester Ctr Integrat Syst Biol, Manchester M13 9PL, Lancs, England