1. Department of Obstetrics and Gynecology, Duke University, Durham, NC, USA
2. School of Medicine, Rush University, Chicago, IL, USA
3. ZSFG Library, University of California San Francisco, San Francisco, CA, USA
4. Family AIDS Care & Education Services, Kisumu, Kenya
5. Department of Family Practice, University of British Columbia, Vancouver, Canada
6. Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA