1. Department of Microbiology and Immunology, University of Otago, Dunedin, Otago, New Zealand
2. Department of Pathology, University of Otago, Dunedin, Otago, New Zealand
3. Centre for Protein Research, University of Otago, Dunedin, Otago, New Zealand
4. Department of Microbiology and Immunology, Otago School of Medical Sciences, University of Otago, Dunedin, Otago, New Zealand