Incidence and predictors of mortality among HIV positive children on anti-retroviral therapy in the selected health facilities of West Wollega Zone, Western Ethiopia: Retrospective cohort study - Gelane Gurmu; Emiru Merdassa; Gemechu Tiruneh; Keneni Efrem; Firezer Belay; Lalisa Mekonnen; Jira Wakoya Feyisa; Matiyos Lema; Adisu Tafari Shama; Markos Desalegn (PLoS ONE, 2025)