1. Department of Family Health Care Nursing, School of Nursing, University of California, San Francisco, San Francisco, California, USA.
2. Division of Adolescent and Young Adult Medicine, Nursing Faculty, School of Medicine, University of California, San Francisco, San Francisco, California, USA.
3. Office of the Dean, School of Nursing, University of California, San Francisco, San Francisco, California, USA.
4. Department of Obstetrics and Gynecology, Boston University School of Medicine/Boston Medical Center, Boston, Massachusetts, USA.