1. Communicable Diseases and Disease Investigation; Auckland Regional Public Health Service; Auckland New Zealand
2. Section of Epidemiology and Biostatistics; University of Auckland; Auckland New Zealand
3. Department of Medicine; Counties Manukau District Health Board, Middlemore Hospital; Auckland New Zealand
4. Department of Medicine, Faculty of Medicine and Health Sciences; University of Auckland; Auckland New Zealand
5. Human Potential Centre, Millennium Institute; Auckland University of Technology; Auckland New Zealand