Vulnerabilities at first sex and their association with lifetime gender-based violence and hiv prevalence among adolescent girls and young women engaged in sex work, transactional sex, and casual sex in Kenya - Becker, M L; Bhattacharjee, P; Blanchard, J F; Cheuk, E; Isac, S; Musioki, H K (J Acquir Immune Defic Syndr, 2018)