About the Authors

Helen E. White

hew@soton.ac.uk

Affiliations National Genetics Reference Laboratory (Wessex), Salisbury District Hospital, Salisbury, United Kingdom, Faculty of Medicine, University of Southampton, Southampton, United Kingdom

Carolyn L. Dent

Affiliation National Genetics Reference Laboratory (Wessex), Salisbury District Hospital, Salisbury, United Kingdom

Victoria J. Hall

Affiliation National Genetics Reference Laboratory (Wessex), Salisbury District Hospital, Salisbury, United Kingdom

John A. Crolla

Affiliation Wessex Regional Genetics Laboratory, Salisbury District Hospital, Salisbury, United Kingdom

Lyn S. Chitty

Affiliations Clinical and Molecular Genetics Unit, University College London Institute of Child Health, London, United Kingdom, Fetal Medicine Unit, University College London Hospitals NHS Foundation Trust, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HEW LSC JAC. Performed the experiments: HEW CLD VJH. Analyzed the data: HEW CLD. Wrote the paper: HEW LSC.