[1] Univ Auckland, Fac Med & Hlth Sci, Dept Med, Auckland, New Zealand
[2] Univ Auckland, Fac Med & Hlth Sci, Te Kupenga Hauora Maori, Auckland, New Zealand
[3] Univ Auckland, Fac Med & Hlth Sci, Dept Gen Practice & Primary Hlth Care, Auckland, New Zealand
[4] Univ Otago, Gen Practice & Rural Hlth, Dunedin, New Zealand
[5] Univ Otago, Kohatu Ctr Hauora Maori, Dunedin Campus, Dunedin, New Zealand
[6] Univ Otago, Fac Dent, Dunedin, New Zealand
[7] Curtin Univ, Perth, WA, Australia
[8] Univ Otago Christchurch, Ctr Postgrad Nursing Studies, Christchurch, New Zealand
[9] Univ Auckland, Fac Med & Hlth Sci, Auckland, New Zealand
[10] Univ Otago, Psychol, Dunedin Campus, Dunedin, New Zealand
[11] Auckland Univ Technol, Fac Hlth & Environm Sci, Auckland, New Zealand
[12] Univ Otago Christchurch, Biostat & Computat Biol Unit, Christchurch, New Zealand
[13] Univ Otago, Kohatu Ctr Hauora Maori, Dunedin, New Zealand