About the Authors
Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: ECH BT EF. Performed the experiments: ECH EMD SSH GR AY LT EF. Analyzed the data: ECH BT SSH EF. Contributed reagents/materials/analysis tools: DCT. Wrote the paper: ECH EF.