About the Authors
La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
Department of Biological Sciences, California State University-San Marcos, San Marcos, California, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: PW AS BP. Performed the experiments: PW JS CD BM. Analyzed the data: PW BP. Contributed reagents/materials/analysis tools: JS CD BM. Wrote the paper: PW JS BM AS BP.