1. Department of Biology, Duke University, Durham, NC, USA.
2. Department of Mathematical Sciences, Florida Atlantic University, Boca Raton, FL, USA.
3. Malaria Biologics Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA.
4. Department of Mathematical Sciences, Montana State University, Bozeman, MT, USA.
5. Program in Computational Biology and Bioinformatics, Duke University, Durham, NC, USA.
6. Department of Mathematics, Duke University, Durham, NC, USA.
7. Department of Medicine, Duke University, Durham, NC, USA.