About the Authors
- Rachel E. Johnson
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Affiliation Division of Virology, National Institute for Biological Standards and Control, Health Protection Agency, Blanche Lane, Potters Bar, Hertfordshire, United Kingdom
- Michelle Hamill
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Affiliation BioStatistics, National Institute for Biological Standards and Control, Health Protection Agency, Blanche Lane, Potters Bar, Hertfordshire, United Kingdom
- Ruth Harvey
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Affiliation Division of Virology, National Institute for Biological Standards and Control, Health Protection Agency, Blanche Lane, Potters Bar, Hertfordshire, United Kingdom
- Carolyn Nicolson
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Affiliation Division of Virology, National Institute for Biological Standards and Control, Health Protection Agency, Blanche Lane, Potters Bar, Hertfordshire, United Kingdom
- James S. Robertson
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Affiliation Division of Virology, National Institute for Biological Standards and Control, Health Protection Agency, Blanche Lane, Potters Bar, Hertfordshire, United Kingdom
- Othmar G. Engelhardt
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* E-mail: othmar.engelhardt@nibsc.hpa.org.uk
Affiliation Division of Virology, National Institute for Biological Standards and Control, Health Protection Agency, Blanche Lane, Potters Bar, Hertfordshire, United Kingdom
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: REJ JSR OGE. Performed the experiments: REJ RH CN. Analyzed the data: REJ MH RH JSR OGE. Contributed reagents/materials/analysis tools: REJ. Wrote the paper: REJ JSR OGE.