About the Authors
The Wellcome Trust/Cancer Research UK Gurdon Institute, The Henry Wellcome Building of Cancer and Developmental Biology, University of Cambridge, Cambridge, United Kingdom
Department of Zoology, University of Cambridge, Cambridge, United Kingdom
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: PN JBG. Performed the experiments: PN DES. Analyzed the data: PN JBG. Contributed reagents/materials/analysis tools: PN JBG. Wrote the paper: PN JBG.