Addressing the challenges and relational aspects of index-linked HIV testing for children and adolescents: insights from the B-GAP study in Zimbabwe oleh Chido Dziva Chikwari, Sarah Bernays, Stefanie Dringus, Victoria Simms, Helen A. Weiss, Edwin Sibanda, Katharina Kranzer, Gertrude Ncube, Rudo Chikodzore, Karen Webb, Trevor Chirimambowa, Kenny Sithole, Nonhlanhla Ndondo, Tsitsi Apollo, Miriam Mutseta, Rashida A. Ferrand