About the Authors
Department of Surgery, Vascular Biology Program, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts, United States of America
Department of Chemistry, Clemson University, Clemson, South Carolina, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MSR LMC PCA KAC. Performed the experiments: MSR LMC KAH LB TPC. Analyzed the data: MSR LMC LB TPC. Wrote the paper: MSR LMC PCA KAC.