Feasibility of identifying a cohort of US women at high risk for HIV infection for HIV vaccine efficacy trials: longitudinal results of HVTN 906. - Koblin BA; Metch B; Novak RM; Morgan C; Lucy D; Dunbar D; Graham P; Swann E; Madenwald T; Escamilia G; Frank I (Journal of acquired immune deficiency syndromes (1999), 2013)