About the Authors
Experimental Transplantation and Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America
University of Pennsylvania, Abramson Family Cancer Research Institute, Philadelphia, Pennsylvania, United States of America
BD BioSciences, San Jose, California, United States of America
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: SA JLR BLL CHJ DHF. Performed the experiments: SA CMC JM JLU WGT VK. Analyzed the data: SA CMC JM JLU WGT VK JLR BLL CHJ. Contributed reagents/materials/analysis tools: BLL CHJ TF NLW. Wrote the paper: SA DHF.