1. Women's Health Waikato DHB; Hamilton New Zealand
2. Department of Obstetrics & Gynaecology; Faculty of Medical and Health Sciences; University of Auckland; Auckland New Zealand
3. Department of Obstetrics, Gynaecology & Neonatology; Sydney Medical School Nepean, The University of Sydney; Sydney New South Wales Australia
4. Department of Obstetrics & Gynaecology; Universiti Kebangsaan Malaysia Medical Centre; Kuala Lumpur Malaysia
5. Department of Preventive and Social Medicine Dunedin School of Medicine University of Otago; Dunedin New Zealand
6. Department of Women's and Children's Health; Dunedin School of Medicine; University of Otago; Dunedin New Zealand