1. Department of Public Health and General Practice, Christchurch School of Medicine and Health Sciences, University of Otago, PO Box 4345, Christchurch, New Zealand
2. School of Rural Health, Monash University, Melbourne, Australia
3. Department of Psychological Medicine, Wellington School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand
4. Ngai Tahu Maori Health Research Unit, Department of Preventive and Social Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
5. Mental Health Directorate, Ministry of Health, Dunedin, New Zealand