\begin{table}%t6
\caption{\label{tab:systematics_coefdif}Best-fit transport parameters based on different low-energy dependence of the
diffusion coefficient.}
%\centering
\par
\begin{tabular}{lcccccc} \hline\hline\noalign{\smallskip}
Type    & $K_0^{\rm best}\times 10^2$     & $\delta^{\rm best}$ &  $V_{\rm c}^{\rm best}$  &  $V_{\rm a}^{\rm best}$  & $\chi^2$/d.o.f   \\
        & (kpc$^2~$Myr$^{-1}$) &                     &  (km$\;$s$^{-1}$)  & (km$\;$s$^{-1}$)   & \\\hline
& \multicolumn{1}{c}{} \vspace{-0.20cm} \\ 
0:~LBI       &   3.48   &   0.45   &  \dots   &  \dots   &   17.5     \vspace{0.05cm}\\  %chi2=507.849  (31)
{\it 0:~SA  }&{\it 4.08}&{\it 0.40}&{\it\dots}&  \dots   &{\it 28.8}  \vspace{0.05cm}\\  %chi2=834.895  (31)
0:~IFM       &   4.30   &   0.38   &  \dots   &  \dots   &   36.7     \vspace{0.05cm}\\  %chi2=1065.23  (31)
0:~Mix       &   3.71   &   0.43   &  \dots   &  \dots   &   23.7    \vspace{0.25cm}\\  %chi2=688.628  (31)
%
%I:LBM      &      &      &      &\dots &        \vspace{0.05cm}\\  %chi2=        (31)
I:~LBI       &   0.40   &   0.94   &   13.6   &  \dots   &   12.0     \vspace{0.05cm}\\  %chi2=323.985  (31)
{\it I:~SA  }&{\it 0.42}&{\it 0.93}&{\it 13.5}&{\it\dots}&{\it 11.2}  \vspace{0.05cm}\\  %chi2=313.468  (31)
I:~IFM       &   0.42   &   0.93   &   13.5   &  \dots   &   11.6     \vspace{0.05cm}\\  %chi2=312.694  (31)
I:~Mix       &   0.41   &   0.94   &   13.5   &  \dots   &   12.0    \vspace{0.25cm}\\  %chi2=323.367  (31)
%
II:~LBI      &   5.50   &   0.38   &  \dots   &   65.0   &   1.61     \vspace{0.05cm}\\  %chi2=43.4453  (31)
{\it II:~SA }&{\it 9.76}&{\it 0.23}&  \dots   &{\it 73.1}&{\it 4.73}  \vspace{0.05cm}\\  %chi2=132.499  (31)
II:~IFM      &   14.0   &   0.16   &  \dots   &   18.9   &   6.86     \vspace{0.05cm}\\  %chi2=185.274  (31)
II:~Mix      &   7.13   &   0.32   &  \dots   &   12.8   &   2.03     \vspace{0.25cm}\\  %chi2=54.8339  (31)
%
III:~LBI     &   0.70   &   0.78   &   18.0   &   47.1   &   0.87     \vspace{0.05cm}\\  %chi2=23.4665  (31)
{\it III:~SA}&{\it 0.48}&{\it 0.86}&{\it 18.8}&{\it 38.0}&{\it 1.47}  \vspace{0.05cm}\\  %chi2=39.7025  (31)
III:~IFM     &   0.49   &   0.85   &   18.9   &   45.6   &   1.25     \vspace{0.05cm}\\  %chi2=33.7739  (31)
III:~Mix     &   0.73   &   0.77   &   17.8   &   57.4   &   0.93     \vspace{0.10cm}\\  %chi2=25.0787  (31)  
% N.B.: 161 steps between 0.05 and 5000 GeV/n used
\hline
\end{tabular}
\tablefoot{Models 0, I, II, and III for $L=4$~kpc. SA corresponds to the reference
DM used throughout the paper.}
\end{table}