1 Centre for Women's Health Research, Faculty of Health, Victoria University of Wellington, New Zealand. Electronic address: bev.lawton@vuw.ac.nz.
2 Department of General Practice and Primary Care, University of Auckland, New Zealand. Electronic address: a.howe@auckland.ac.nz.
3 Department of General Practice and Primary Care, University of Auckland, New Zealand. Electronic address: n.turner@auckland.ac.nz.
4 Department of Obstetrics and Gynaecology and Department of Pathology and Molecular Medicine, Department of Obstetrics and Gynaecology, University of Otago, Wellington, New Zealand. Electronic address: sara.filoche@otago.ac.nz.
5 Department of Pathology, University of Otago Dunedin School of Medicine, University of Otago, New Zealand. Electronic address: tania.slatter@otago.ac.nz.
6 Children's and Women's Health, University of Otago Dunedin School of Medicine, University of Otago, New Zealand. Electronic address: celia.devenish@otago.ac.nz.
7 Department of Pathology, University of Otago Dunedin School of Medicine, University of Otago, New Zealand. Electronic address: noelyn.hung@otago.ac.nz.