About the Authors
Department of Biology, Boston University, Boston, Massachusetts, United States of America
Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America
The authors have declared that no competing interests exist.
DWW, JVV, and MW conceived and designed the experiments. DWW and JVV performed the experiments. RMC and MW analyzed the data. RMC and JVV contributed reagents/materials/analysis tools. DWW, RMC, JVV, and MW wrote the paper.