1 Department of Ob/Gyn, St. Mariana University, Kawasaki, Japan kazuhironanami@gmail.com aaron.hsueh@stanford.edu.
2 Department of Ob/Gyn, St. Mariana University, Kawasaki, Japan.
3 Reproductive Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
4 Fundación Instituto Valenciano de Infertilidad (FIVI), Valencia University and Instituto Universitario IVI/INCLIVA/La Fe University Hospital, Paterna, Spain.
5 Fundación Instituto Valenciano de Infertilidad (FIVI), Valencia University and Instituto Universitario IVI/INCLIVA/La Fe University Hospital, Paterna, Spain Department of Ob/Gyn, Stanford University School of Medicine, Stanford, CA 94305-5317, USA.
6 Department of Ob/Gyn, Stanford University School of Medicine, Stanford, CA 94305-5317, USA kazuhironanami@gmail.com aaron.hsueh@stanford.edu.