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\begin{document}
  
  
  
  \begin{tabular}{ccccccccc}
    \hline
    Parameter & \multicolumn{8}{c}{Uncertainty}\\
    & ${\cal S}/{\cal B}$ & $\epsilon$ & ${\cal B}$ DP & fit bias & ${\cal B}$ asym. & ${\cal B}$ DP asym. & $\epsilon$ asym. & total \\
    \hline
    $x_{+}$ & 0.010 & 0.035 & 0.046 & 0.021 & 0.007 & 0.049 & 0.000 & 0.079 \\
    $x_{-}$ & 0.026 & 0.028 & 0.063 & 0.019 & 0.010 & 0.045 & 0.001 & 0.089 \\
    $y_{+}$ & 0.019 & 0.042 & 0.122 & 0.066 & 0.017 & 0.027 & 0.000 & 0.149 \\
    $y_{-}$ & 0.024 & 0.022 & 0.054 & 0.035 & 0.018 & 0.071 & 0.000 & 0.103 \\
    \hline
  \end{tabular}
\end{document}
