1. Tōmaiora Māori Health Research Group, Te Kupenga Hauora Māori, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
2. Section of Epidemiology and Biostatistics, School of Population Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
3. Sleep/Wake Research Centre, College of Health, Massey University, Wellington, New Zealand