1. AIDS Epidemiology Group Department of Preventive and Social Medicine Dunedin School of Medicine University of Otago Dunedin New Zealand
2. Department of Preventive and Social Medicine Dunedin School of Medicine University of Otago Dunedin New Zealand
3. Capital and Coast District Health Board Wellington New Zealand
4. Auckland District Health Board Auckland New Zealand
5. Bay of Plenty and Lakes District Health Board Tauranga and Rotorua New Zealand