1. Division of Obstetrics and Gynecology, Department of Women’s and Children’s Health, Karolinska Institutet, and Karolinska University Hospital, S-171 76 Stockholm, Sweden
2. Department of Endometrial Receptivity Analysis, Igenomix S.L., Valencia, Spain
3. Department of Obstetrics and Gynecology, University of Valencia/INCLIVA, Valencia, Spain
4. Department of Obstetrics and Gynecology, Stanford University, CA, USA