deletions | additions       diff --git a/3 Materials and methods.tex b/3 Materials and methods.tex  index 1eca54b..2373ce9 100644  --- a/3 Materials and methods.tex  +++ b/3 Materials and methods.tex 
...
\item   the source of all samples, reagents, antibodies etc.  \item   how samples were selected\end{itemize}; what selectedwhat  exclusions were made, if any; \item   what was being measured  \item  
...
Allowances made, if any, for controlling bias or unwanted sources of variability.  Limitations of the datasets.\item   Acronyms and abbreviations must be explained. \end{itemize};