Adherence to antiretroviral therapy and its associated factors among children living with HIV in Eastern and Southern Africa: A systematic review and meta-analysis - Gebrie Getu Alemu; Bantie Getnet Yirsaw; Tigabu Kidie Tesfie; Getaneh Awoke Yismaw; Habtamu Wagnew Abuhay; Meron Asmamaw Alemayehu; Muluken Chanie Agimas; Nebiyu Mekonnen Derseh (PLoS ONE)