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\begin{document}
\footnotesize
\begin{tabular}{l......}
\hline
\multirow{2}{2cm}{\mbox{Source}}   &  \multicolumn{2}{c}{$D^*_0(2400)^-$}   &  \multicolumn{2}{c}{$D^*_2(2460)^-$}  &  \multicolumn{2}{c}{$D^*_3(2760)^-$}  \\\cline{2-7}
 &  \multicolumn{1}{c}{$\Gamma_0$}  &  \multicolumn{1}{c}{$m_0$}  &  \multicolumn{1}{c}{$\Gamma_0$}  &  \multicolumn{1}{c}{$m_0$}  &  \multicolumn{1}{c}{$\Gamma_0$}  &  \multicolumn{1}{c}{$m_0$} \\
\hline
PID                   &  1.9  &  0.5  &  <0.1  &  <0.1  &  1.2  &  0.3  \\
Trigger               &  0.5  &  0.2  &   0.2  &  <0.1  &  1.9  &  0.7  \\
Reconstruction        &  0.2  &  0.1  &  <0.1  &  <0.1  &  0.5  &  0.1  \\
Simulation statistic  &  0.6  &  0.1  &  0.1  &  <0.1  &  0.6  &  0.1  \\
Background model      &  1.5  &  0.6  &  0.1  &  <0.1  &  3.4  &  0.4 \\
$D^*(2010)^-$ veto    &  4.4  &  0.8  &  <0.1  &  <0.1  &  4.6  &  0.4 \\ \hline
Total (experiment)    &  5.1  &  1.1  &  0.3  &  <0.1  &  6.2  &  1.0 \\
\hline
Additional resonances  &  10.7  &  0.4  &  0.1   &  0.1  &  21.0  &  5.1 \\
RBW parameters         &  0.1  &  1.9  &  0.1   &  <0.1  &  1.0  &  1.5 \\
$\pi\pi$ res. mass, width  &  3.4  &  0.1  &  0.1   & 0.1  &  2.9  &  1.3 \\
$B^0$, $D^0$ mass  &  0.2   &  0.2  &  0.2  &  0.2   &  0.2   &  0.2  \\
$f_0(500)$ model  &  2.3  &  3.6  &  0.5  &  <0.1  &  9.0  &  3.5  \\
$f_0(980)$ model  &  2.8  &  0.7  &  0.2  &  0.1  &  3.5  &  1.2  \\
\hline
Total (model)  &  11.8  &  4.2  &  0.6  &  0.3  &  23.3  &  6.6 \\
\hline
Total (all)  &  12.9  &  4.3  &  0.7  &  0.3  &  24.1  &  6.7 \\
\hline
\end{tabular}
\end{document}
