deletions | additions       diff --git a/sec_Biomarkers_of_AD.tex b/sec_Biomarkers_of_AD.tex  index 77d0c01..f058f3e 100644  --- a/sec_Biomarkers_of_AD.tex  +++ b/sec_Biomarkers_of_AD.tex 
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\item cognitive impairment  \end{itemize}  Cognitive impairment starts to appear years after the changes in the other biomarkers.  In the following sections we considerstate of  the remaining four biomarkers individually.