1 The Center for Human Reproduction, New York, NY 10021, USA; Stem Cell Biology and Molecular Embryology Laboratory, The Rockefeller University, New York, NY, USA; Department of Obstetrics and Gynecology, Vienna University of Medicine, Vienna, Austria. Electronic address: ngleicher@thechr.com.
2 The Center for Human Reproduction, New York, NY 10021, USA; Department of Obstetrics and Gynecology, Wake Forest University, Winston Salem, NC, USA.
3 Department of Obstetrics and Gynecology, Vienna University of Medicine, Vienna, Austria.