1 Department of Obstetrics and Gynecology, University of New Mexico Health Sciences Center, 2211 Lomas Blvd NE, Albuquerque, NM 87106. klbarnes@salud.unm.edu.
2 University of New Mexico Health Sciences Center, Albuquerque, New Mexico, USA.
3 Massachusetts General Hospital, Boston, Massachusetts, USA.
4 Harvard Medical School, Boston, Massachusetts, USA.