deletions | additions       diff --git a/sec_Biomarkers_of_AD.tex b/sec_Biomarkers_of_AD.tex  index 481fad8..4257e43 100644  --- a/sec_Biomarkers_of_AD.tex  +++ b/sec_Biomarkers_of_AD.tex 
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These biomarkers have different relevance at different stages of AD progression.  Jack et al \cite{Jack2010,Jack_2013} describe the temporal evolution of AD biomarkers and their interrelationships amongst themselves, and with the onset and progression of clinical symptoms.  Figure \ref{fig:hypotheticalModelJack_2013} shows the staging of the disease and the biomarkers of AD.  Currently there are five established biomarkers of for  AD: \begin{itemize}  \item A$\beta$ protein  \item Tau protein