<p>It is not clear what the independent variables were assessing. What cut of put of baseline CD4 did the authors use or was it just any value? Was using substances associated with shorter days to viral suppression?&nbsp;</p><p>"Kaplan Meier log-rank test was used to compare time to event experience between groups." - which groups were the authors referring to? The authors can improve the presentation of the result section to improve clarity.&nbsp;</p>