1 Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA.
2 College of Veterinary Medicine, Department of Population Health and Pathobiology, North Carolina State University, Raleigh, NC, USA.
3 Genital Tract Biology Division, Department of Obstetrics, Gynecology and Reproductive Biology, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA. Electronic address: rfichorova@bwh.harvard.edu.