Viral load change and time to death among adult HIV/AIDS patients on ART after test-and-treat in Northwest Ethiopia: a retrospective multi-center follow-up study using Bayesian joint modeling - Abeje, Eyob Tilahun; Agedew, Eskezyiaw; Endalew, Bekalu; Alen, Gedefaw Diress (Frontiers in Public Health, 2025)