1. Department of Preventive and Social Medicine Otago Medical School – Dunedin Campus University of Otago Dunedin New Zealand
2. Pharmacoepidemiology Research Network University of Otago Dunedin New Zealand
3. Department of Mathematics and Statistics University of Otago Dunedin New Zealand
4. Department of Medicine Otago Medical School – Dunedin Campus University of Otago Dunedin New Zealand
5. Department of Epidemiology and Biostatistics Faculty of Medical and Health Sciences University of Auckland Auckland New Zealand
6. Auckland Regional Public Health Service Auckland New Zealand