1. Department of Reproductive Medicine and Gynecology; University Medical Center Utrecht; Room F5.126, PO Box 85500, Utrecht Netherlands 3508 GA
2. McMaster University, REI Consultant, ONE Fertility; Department of Obstetrics and Gynaecology; 1200 Main Street West Room 4D14 Hamilton ON Canada L8N 3Z5
3. University of Auckland; Department of Obstetrics and Gynaecology; Private Bag 92019 Auckland New Zealand
4. Isala Clinics, Location Sophia; Department of Obstetrics & Gynaecology; Dr van Heesweg 2 P O Box 10400 Zwolle Netherlands 3515 BE