1. The University of Sheffield; Department of Oncology & Metabolism, Academic Unit of Reproductive and Developmental Medicine; Academic Unit of Reproductive and Developmental Medicine Level 4, The Jessop Wing Sheffield UK S10 2SF
2. Fertility Plus, Women's Health, Auckland District Health Board; Auckland New Zealand
3. IVF Consultancy Services; Leicester UK
4. University of Auckland; Department of Obstetrics and Gynaecology; FMHS Park Road Grafton Auckland New Zealand 1003