[1] Univ Calif Irvine, NSF Simons Ctr Multiscale Cell Fate Res, Irvine, CA USA
[2] Univ Calif Irvine, Dept Dev & Cell Biol, Irvine, CA 92717 USA
[3] Univ Calif Riverside, Dept Math, Riverside, CA 92521 USA
[4] Univ Calif Irvine, Dept Math, Irvine, CA 92717 USA