1. University of Auckland; Department of Obstetrics and Gynaecology; Private Bag 92019 Auckland New Zealand
2. Academic Medical Center; Department of Obstetrics and Gynaecology; Meibergdreef 9 Amsterdam Netherlands 1105AZ
3. Isala Clinics, Location Sophia; Department of Obstetrics and Gynaecology; Dr van Heesweg 2 Isala Zwolle Netherlands
4. Department of Reproductive Medicine and Gynecology; University Medical Center Utrecht; Room F5.126, PO Box 85500, Utrecht Netherlands 3508 GA