Trial design and enrolment characteristics of LATA (long-acting treatment in adolescents): A randomised, open-label, non-inferiority, 96-week trial evaluating the virological efficacy, safety, acceptability and quality-of-life of the dual long-acting injectable regimen cabotegravir/ rilpivirine compared to daily oral therapy in virologically suppressed adolescents with HIV-1 infection, aged 12 to <20 years, in Sub-Saharan Africa | Synapse