1. AgResearch, Lincoln Science Centre, Lincoln, New Zealand
2. Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln, New Zealand
3. Manaaki Whenua - Landcare Research, Palmerston North, New Zealand
4. AgResearch, Invermay Agricultural Centre, Mosgiel, New Zealand
5. Department of Public Health, University of Otago, Wellington, New Zealand
6. New Zealand Institute of Economic Research, Wellington, New Zealand