*Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles Biomedical Institute at Harbor-UCLA Medical Center
†Department of Public Health, Fielding School of Public Health at UCLA, Torrance, California
The authors declare that there is nothing to disclose.
Correspondence: Michael G. Ross, MD, MPH, Department of Obstetrics and Gynecology, Harbor-UCLA Medical Center, RB3 Box 467, Torrance, CA. E-mail: firstname.lastname@example.org