About the Authors
Department of Environmental Health Sciences, University of California, Berkeley, California, United States of America
Department of Pediatrics, University of California San Francisco, San Francisco, California, United States of America
Institute for Parasitic Diseases, Sichuan Center for Disease Control and Prevention, Chengdu, China
Department of Biostatistics, University of California, Berkeley, California, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: YZ RCS. Performed the experiments: YZ. Analyzed the data: EJC MH SJ AH. Wrote the paper: EJC. Edited the paper: EJC MH YZ AH RCS.