\begin{table}
\caption{Parameter estimates and posterior highest densitiy intervals (HDI) of the guts__guts_reduced model. The HDI contains 94\% of the probable parameter values given the data.}
\label{tab:parameters-guts__guts_reduced}
\begin{tabular}{llllllllll}
\toprule
Parameters & \multicolumn{3}{r}{Diuron} & \multicolumn{3}{r}{Diclofenac} & \multicolumn{3}{r}{Naproxen} \\
 & mean & hdi 3\% & hdi 97\% & mean & hdi 3\% & hdi 97\% & mean & hdi 3\% & hdi 97\% \\
\midrule
${k}_{d}$ & 0.80 & 0.08 & 2.17 & 0.03 & 0.02 & 0.04 & 0.00 & 0.00 & 0.00 \\
${z}$ & 5.60 & 2.20 & 8.35 & 4.85 & 4.11 & 5.59 & 9.24 & 0.43 & 22.17 \\
${k}_{k}$ & 0.00 & 0.00 & 0.00 & 0.03 & 0.02 & 0.04 & 0.02 & 0.00 & 0.06 \\
${h}_{b}$ & 0.00 & 0.00 & 0.00 & 0.00 & 0.00 & 0.00 & 0.00 & 0.00 & 0.00 \\
\bottomrule
\end{tabular}
\end{table}