1. a Center for Health Care Innovation , California State University , Long Beach , CA , USA
2. b Division of HIV/AIDS Prevention , Centers for Disease Control and Prevention (CDC) , Atlanta , GA , USA
3. c Division of Reproductive Health , Centers for Disease Control and Prevention (CDC) , Atlanta , GA , USA
4. d Denver Public Health , Denver , CO , USA
5. e University of San Francisco , San Francisco , CA , USA
6. f San Francisco School of Medicine , University of California , San Francisco , CA , USA