deletions | additions       diff --git a/section_Historical_background_Incidence_surveys__.tex b/section_Historical_background_Incidence_surveys__.tex  index 1b41e40..c1fef33 100644  --- a/section_Historical_background_Incidence_surveys__.tex  +++ b/section_Historical_background_Incidence_surveys__.tex 
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\section{Historical background}  Incidence surveys impractical\cite{18201929}(LID paper)  Best sources of data on TB burden are   \begin{itemize} 
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