About the Authors

Patricia C. Priest

patricia.priest@otago.ac.nz

Affiliation Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand

Alasdair R. Duncan

Affiliation Planning and Funding, Canterbury District Health Board, Christchurch, New Zealand

Lance C. Jennings

Affiliation Virology Section, Canterbury Health Laboratories, Christchurch, New Zealand

Michael G. Baker

Affiliation Department of Public Health, University of Otago Wellington, Wellington, New Zealand

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PCP ARD LCJ MB. Performed the experiments: ARD LCJ. Analyzed the data: PCP. Wrote the paper: PCP ARD LCJ MB.