1. Department
of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794, United States
2. Department
of Pharmaceutical Chemistry, University of California in San Francisco, San Francisco, California 94107, United States
3. New
Mexico Center for Spatiotemporal Modeling of Cell Signaling, University of New Mexico, Albuquerque, New Mexico 87131, United States
4. Department of Mathematics, Texas A&M University, College Station, Texas 77843, United States