1. Department of Health and Social Care, The Open University, Milton Keynes, UK; Department of Psychological Medicine, The University of Auckland, Auckland, New Zealand
2. Department of Psychological Medicine, The University of Auckland, Auckland, New Zealand
3. School of Health, Victoria University of Wellington, Wellington, New Zealand; Department of Psychological Medicine, The University of Auckland, Auckland, New Zealand
4. School of Psychology, Massey University – Albany Campus, Auckland, New Zealand