\begin{table}[]
\centering
\rowcolors{2}{lightgray!40}{}
\caption{}
\begin{tabular}{c c c c c}\rowcolor{lightgray} 
Parameter & PFIM & PopED & NONMEM & MlxDesignEval \\ 
$\mu_{ka}$ & NA & 5.5 & 5.5 & 5.5 \\ 
$\mu_{Cl}$ & NA & 5.3 & 5.3 & 5.3 \\ 
$\mu_{V}$ & NA & 7.6 & 7.6 & 7.6 \\ 
$\beta_{Cl, Treat}$ & NA & 35.9 & 35.9 & 35.9 \\ 
$\beta_{V, Sex}$ & NA & 57.8 & 57.8 & 57.8 \\ 
$\omega^2_{ka}$ & NA & 29.8 & 29.6 & 29.8 \\ 
$\omega^2_{Cl}$ & NA & 25.4 & 25.4 & 25.4 \\ 
$\omega^2_{V}$ & NA & 27.9 & 27.9 & 27.9 \\ 
$\gamma^2_{ka}$ & NA & 43.3 & 73.2 & 43.3 \\ 
$\gamma^2_{Cl}$ & NA & 23.2 & 41.9 & 23.2 \\ 
$\gamma^2_{V}$ & NA & 33.3 & 57.8 & 33.3 \\ 
$a^2$ & NA & 10.5 & 10.5 & 10.5 \\ 
\end{tabular} 
 label{tab:} 
 \end{table}