Amanda Kvalsvig1, Nick Wilson2, Ling Chan3, Sophie Febery4, Sally Roberts5, Bryan Betty6, Michael Baker2. 1. Senior Research Fellow, Department of Public Health, University of Otago, Wellington. 2. Professor, Department of Public Health, University of Otago, Wellington. 3. Senior Pathology Registrar, Southern Community Laboratories, Dunedin. 4. General Practitioner, Methven. 5. Clinical Head of Microbiology, Microbiology Department, Auckland District Health Board, Auckland. 6. Medical Director Royal New Zealand College of General Practitioners (RNZCGP), General Practitioner, East Porirua and RNZCGP, Wellington.