About the Authors
Norris Comprehensive Cancer Center, Department of Molecular Microbiology & Immunology, University of Southern California Keck School of Medicine, Los Angeles, California, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: XFH SYC LW. Performed the experiments: LW BH XJ LJ. Analyzed the data: XFH LW. Contributed reagents/materials/analysis tools: LW BH XJ. Wrote the paper: XFH LW.