About the Authors

Gertrude Case Buehring

buehring@berkeley.edu

Affiliation Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, California, United States of America

Hua Min Shen

Affiliation Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, California, United States of America

Hanne M. Jensen

Affiliation Department of Pathology and Laboratory Medicine, University of California, Davis Medical Center, Sacramento, California, United States of America

Diana L. Jin

Affiliation Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, California, United States of America

Mark Hudes

Affiliation Atkins Center for Weight and Health, University of California, Berkeley, California, United States of America

Gladys Block

Affiliation Division of Community Health and Human Development, School of Public Health, University of California, Berkeley, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GCB HMJ GB. Performed the experiments: HMS DLJ. Analyzed the data: GCB HMJ GB MH. Wrote the paper: GCB HMS HMJ DLJ GB.