1. Mater Mother's Hospital; Department of Obstetrics and Gynaecology; South Brisbane Brisbane Queensland Australia 4101
2. Balliol College, University of Oxford; Nuffield Department of Primary Care Health Sciences; New Radcliffe House 58 Turner Street Oxford Oxfordshire UK OX2 6NW
3. Hamad Medical Corporation; Qatar Qatar
4. University of Auckland; Department of Obstetrics and Gynaecology; FMHS Park Road Grafton Auckland New Zealand 1003
5. Univ. Hospital Leuven, Campus Gasthuisberg; Department of Obstetrics & Gynecology; Herestraat 49B Leuven Belgium B-3000
6. Wisconsin Fertility Institute; 3146 Deming Way Middleton Wisconsin USA 53562