RING: Virtual Interview SOP (1166) RING SOP RING EmailInterview PrEPParticipantReminder SOP Female WomenIntravaginal RingCouplesCrossoverHeterosexual RCTVirtualPreventionDomestic 2022PreventionBehavioralCommunity HealthDevelopmentalVirologyClinicalCrossover RCTQualitativeClinicalVirtual participant interview SOP for the RING study.