About the Authors
MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: CAS. Performed the experiments: EVC. Analyzed the data: EVC. Contributed reagents/materials/analysis tools: EVC CAS. Wrote the paper: EVC WAB CAS.