About the Authors
Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, United States of America
Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People's Republic of China
The authors have declared that no competing interests exist.
Conceived and designed the experiments: CY LY RWC. Performed the experiments: GSM WL. Analyzed the data: GSM LY CY RWC. Wrote the paper: GSM CY RWC.