1. Cell Therapy and Stem Cell Group, Basque Center for Blood Transfusion and Human Tissues, Barrio Labeaga S/N, Galdakao, Spain
2. Barcelona Stem Cell Bank, Centre of Regenerative Medicine in Barcelona, Barcelona, Spain
3. Department of Anatomy and Embryology, Leiden University Medical Center, Einthovenweg 20, Leiden, The Netherlands
4. Ghent Fertility and Stem cell Team (G-FaST), Department for Reproductive Medicine, Ghent University Hospital, Ghent, Belgium
5. Research Group Reproduction and Genetics, Vrije Univeristeit Brussel, Laarbeeklaan 103, Jette (Brussels), Belgium
6. Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
7. Clínica EUGIN, Barcelona, Spain
8. Dexeus Mujer, Hospital Universitari Dexeus, Barcelona, Spain