1. Department of Obstetrics and Gynecology Amsterdam Reproduction and Development Institute, Amsterdam UMC, University of Amsterdam Amsterdam The Netherlands
2. Department of Obstetrics and Gynecology Amsterdam Reproduction & Development Institute, Amsterdam UMC, Vrije Universiteit Amsterdam The Netherlands
3. Department of Obstetrics and Gynecology Monash University Melbourne Victoria Australia
4. Aberdeen Centre for Women's Health Research, School of Medicine, University of Aberdeen Aberdeen UK