\begin{table}%t5
%\centering
\par
\caption{\label{SFassociations}Association (within 1$^{\prime}$) of the APEX 870~$\mu$m sources with  active star-formation tracers, such as {\it Spitzer} 3.6~$\mu$m, 8~$\mu$m and 24~$\mu$m; water, methanol and OH masers; HII regions; and IRAS sources.}
\smallskip \begin{tabular}{l c c c  c c c c  c} 
\hline\hline \noalign{\smallskip}  
APEX & \multicolumn{3}{c}{{\it Spitzer}} & \multicolumn{3}{c}{Masers} & HII & IRAS \\   
& 3.6 & 8 & 24 & H$_2$O & OH & CH$_3$OH & &\\   
(1)&(2)&(3)&(4)&(5)&(6)&(7)&(8)&(9)\\
\hline
C1       & {\bf +} & {\bf +} & {\bf +} & {\bf +} & {\bf +} & {\bf +} & {\bf +} & {\bf +}  \\  
C2 	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & --  \\
C3 	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & {\bf +} & --  & {\bf +}  \\  
C4 	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & {\bf +} & --  & --  \\
C5 	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & --  \\
C6 	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & {\bf +}  \\  
C7 	 & {\bf +} & {\bf +} & {\bf +} & --  & {\bf +} & {\bf +} & {\bf +} & {\bf +} \\ 
C8 	 & {\bf +} & {\bf +}  & {\bf +} & --  & --  & {\bf +} & --  & --  \\
C9 	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & --  \\
C10	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & {\bf +} \\ 
C11	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & --  \\
C12	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & {\bf +}  & {\bf +}  \\ 
C13	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & --  \\    
C14	 & {\bf +} & {\bf +} & {\bf +} & --  & --  & --  & --  & {\bf +}  \\ 
\hline
\end{tabular}
\tablefoot{The ``{\bf +}'' symbol indicates that the association with the tracer has been observed; while the ``--'' symbol indicates that it has not been observed.}
\vspace*{2mm}\end{table}