About the Authors
- Steven A Harvey, James C Smith
- Wellcome Trust/CR-UK Gurdon Institute and Department of Zoology, The University of Cambridge, Cambridge, United Kingdom
- James C Smith
- MRC National Institute for Medical Research, The Ridgeway, Mill Hill, London, United Kingdom
The authors have declared that no competing interests exist.
SAH and JCS conceived and designed the experiments. SAH performed the experiments. SAH and JCS wrote the paper.