docs: api, update intro, related: #5, #1

docs/api/intro.tex

@@ -27,15 +27,15 @@ \section{Introduction}
 While viral suppression improved under UTT in all three trials,
 21--54\% of study participants remained unsuppressed \cite{Iwuji2018,Havlir2019,Hayes2019}.
 Populations experiencing barriers to viral suppression under UTT
-may be at highest risk for onward transmission, including key populations like
-sex workers, men who have sex with men, and adolescent girls and young women
-\cite{Hakim2018,Nyato2019,Green2020}.
+may be at highest risk for acquisition and onward transmission, including key populations like
+sex workers and men who have sex with men \cite{Hakim2018,Nyato2019},
+as well as youth, and heterosexual men \cite{Green2020,Quinn2019}.
 While widespread UTT scale-up may fill some coverage gaps,
-equitable access to ART for marginalized populations remains an open challenge.
+equitable access to ART for all populations remains an open challenge.
 \par
 Given the upstream and complementary role of transmission modelling
 in estimating the prevention impacts of ART \cite{Eaton2012,Delva2012},
-we sought to examine representations of risk heterogeneity
+we sought to examine how heterogeneity in risk and ART uptake has been represented
 in mathematical models used to assess the prevention impacts of ART in SSA.
-We conducted a scoping review with the following objectives.
+We conducted a scoping review and ecological regression with the following objectives.
 \input{rqs}