IlariaG, JacobsJL, PolskyB, et al.Detection of HIV-1 DNA sequences in pre-ejaculatory fluid. Lancet (London, England), 1992; 340:1469.
2.
BaetenJM, KahleE, LingappaJR, et al.Genital HIV-1 RNA predicts risk of heterosexual HIV-1 transmission. Sci Transl Med, 2011; 3:77ra29.
3.
de VincenziI. A longitudinal study of human immunodeficiency virus transmission by heterosexual partners. European Study Group on Heterosexual Transmission of HIV. N Engl J Med, 1994; 331:341–346.
4.
HornerJR, SalazarLF, RomerD, et al.Withdrawal (coitus interruptus) as a sexual risk reduction strategy: Perspectives from African-American adolescents. Arch Sex Behav, 2009; 38:779–787.
5.
HigginsJA, WangY. Which young adults are most likely to use withdrawal? The importance of pregnancy attitudes and sexual pleasure. Contraception, 2015; 91:320–327.
6.
SznitmanSR, RomerD, BrownLK, et al.Prevalence, correlates, and sexually transmitted infection risk related to coitus interruptus among African-American adolescents. Sex Transm Dis, 2009; 36:218–220.
7.
KoenigLJ, HoyerD, PurcellDW, ZazaS, MerminJ. Young people and HIV: A call to action. Am J Public Health, 2016; 106:402–405.
8.
HarrisPA, TaylorR, ThielkeR, PayneJ, GonzalezN, CondeJG. Research electronic data capture (REDCap)—A metadata-driven methodology and workflow process for providing translational research informatics support. J Biomed Inform, 2009; 42:377–381.
9.
HigginsJA, GregorL, MathurS, NakyanjoN, NalugodaF, SantelliJS. Use of withdrawal (coitus interruptus) for both pregnancy and HIV prevention among young adults in Rakai, Uganda. J Sex Med, 2014; 11:2421–2427.
10.
BraunV, ClarkeV. Using thematic analysis in psychology. Qual Res Psychol, 2006; 3:77–101.
