Birlie, B., Braekers, R., Awoke, T., Kasim, A., & Shkedy, Z. (2017). Multi-state models for the analysis of time-to-treatment modification among HIV patients under highly active antiretroviral therapy in Southwest Ethiopia. BMC Infectious Diseases, 17(1), Article 453. https://doi.org/10.1186/s12879-017-2533-3