1. University of Auckland; Department of Obstetrics and Gynaecology; Park Road Grafton Auckland New Zealand 1142
2. Auckland City Hospital; Department of Obstetrics and Gynaecology; Auckland New Zealand 1142
3. The University of Western Australia, King Edward Memorial Hospital and Fertility Specialists of Western Australia; School of Women's and Infants' Health; 374 Bagot Road Subiaco, Perth Western Australia Australia 6008