About the Authors
University of Cambridge, Cambridge Institute for Medical Research, Cambridge, United Kingdom
Department of Cell Biology, University of Alberta, Edmonton, Canada
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: MSR JBD JH LB GCF DAS MNJS. Performed the experiments: JH LB GCF DAS MSR JBD MNJS. Analyzed the data: JH LB GCF DAS MSR JBD. Contributed reagents/materials/analysis tools: JH LB GCF DAS MSR JBD. Wrote the paper: MSR JBD JH.