About the Authors
HIV Drug Resistance Program, National Cancer Institute and SAIC-Frederick, NCI-Frederick, Frederick, Maryland, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: DM DD. Performed the experiments: DM AI PL. Analyzed the data: DM AI GH PL DD. Contributed reagents/materials/analysis tools: DM. Wrote the paper: DM GH DD.