PEBRA trial – effect of a peer-educator coordinated preference-based ART service delivery model on viral suppression among adolescents and young adults living with HIV: protocol of... oleh Thabo Ishmael Lejone, Mathebe Kopo, Nadine Bachmann, Jennifer Anne Brown, Tracy Renée Glass, Josephine Muhairwe, Tebatso Matsela, Ramona Scherrer, Lebohang Chere, Tilo Namane, Niklaus Daniel Labhardt, Alain Amstutz