\begin{table}%t2
   \caption{Estimated ages for the YLA published in the literature.}
   \label{tab.AssocAges}
%\centering
\par
\begin{tabular}{llll}
\hline
\hline
Association     & Estimated age       & Method             & Reference \\
\hline\noalign{\smallskip}
TW Hya          & 10$^{+10}_{-5}$ Myr & Spectroscopy + HR diagram (BVI) & Soderblom et~al. (\cite{Soderblom98}) \\
                & $\sim$8 Myr        & HR diagram (JHK)   & Webb et~al. (\cite{Webb99}) \\
                & 5--15 Myr            & HD diagram (IR)    & Weintraub et~al. (\cite{Weintraub00}) \\
	        & 8.3 Myr             & Expansion age      & Makarov \& Fabricius (\cite{Makarov01}) \\
	        & 4.7 $\pm$ 0.6 Myr   & Expansion age      & Makarov et~al. (\cite{Makarov05}) \\
	        & 20$^{+25}_{-7}$ Myr & Expansion age      & Mamajek (\cite{Mamajek05}) \\
	        & 8.3 $\pm$ 0.8 Myr   & Dynamical age      & de la Reza et~al. (\cite{delaReza06}) \\
	        & 10$^{+10}_{-7}$ Myr & Spec. + HR diagram (VIJK) + Li + H$\alpha$ & Barrado y Navascu\'es (\cite{Barrado06}) \\
\hline
Tuc-Hor/GAYA    & $\sim$40 Myr        & H$\alpha$ emission & Zuckerman \& Webb (\cite{Zuckerman00}) \\
                & 10--30 Myr           & X-ray emission     & Stelzer \& Ne\"uhauser (\cite{Stelzer00}) \\
	        & $\sim$30 Myr        & Kinematic + HR diagram (BV)      & Torres et~al. (\cite{Torres00}) \\
	        & 10--40 Myr           & HR diagram (VRI)   & Zuckerman et~al. (\cite{Zuckerman01b}) \\
		& $\sim$20 Myr        & Kinematic age      & Torres et~al. (\cite{Torres01}) \\
		& 27 Myr              & Dynamical age      & Makarov (\cite{Makarov07}) \\
\hline
$\beta$ Pic-Cap & 20 $\pm$ 10 Myr     & HR diagram (BVI)   & Barrado y Navascu\'es (\cite{Barrado99}) \\
                & 12$^{+8}_{-4}$ Myr  & HR diagram (VI) + Li & Zuckerman et~al. (\cite{Zuckerman01a}) \\
	        & 11.2 $\pm$ 0.3 Myr  & Dynamical age      & Ortega et~al. (\cite{Ortega02}) \\
		& 12 Myr              & Dynamical age      & Song et~al. (\cite{Song03}) \\
		& 22 $\pm$ 12 Myr     & Dynamical age      & Makarov (\cite{Makarov07}) \\ 
\hline
$\epsilon$ Cha  & 5--15 Myr            & HR diagram (BV)    & Terranegra et~al. (\cite{Terranegra99}) \\
                & 3--5 Myr             & HR diagram (VI)    & Feigelson et~al. (\cite{Feigelson03}) \\
                & 7 Myr               & Dynamical age      & Jilinski et~al. (\cite{Jilinski05}) \\
\hline
$\eta$ Cha      & 2--18 Myr            & HR diagram (R) + Li & Mamajek et~al. (\cite{Mamajek99}) \\
                & 10--15 Myr           & Dynamical age      & Mamajek et~al. (\cite{Mamajek00}) \\
		& 5 $\pm$ 4 Myr       & HR diagram (VRI)   & Lawson et~al. (\cite{Lawson01}) \\
		& 6$^{+2}_{-1}$ Myr   & HR diagram (JHK)   & Luhman \& Steeghs (\cite{Luhman04}) \\
		& 7 Myr               & Dynamical age      & Jilinski et~al. (\cite{Jilinski05}) \\
\hline
HD 141569       & 5 $\pm$ 3 Myr       & X-ray + Li + HR diagram (JHK) & Weinberger et~al. (\cite{Weinberger00}) \\
                & 4.7 $\pm$ 0.3 Myr   & Spectroscopy + Kurucz's (\cite{Kurucz93}) models & Mer\'{\i}n et~al. (\cite{Merin04}) \\
\hline
Ext. R CrA      & 10--15 Myr           & HR diagram (BVRI-JHK) & Neuha\"user et~al. (\cite{Neuhauser00}) \\
                & $\sim$15 Myr        & Dynamical age      & Quast et~al. (\cite{Quast01}) \\
\hline
AB Dor          & $\sim$ 50 Myr       & H$\alpha$ emission & Zuckerman et~al. (\cite{Zuckerman04a}) \\
                & 75--150 Myr          & HR diagram (VK)    & Luhman et~al. (\cite{Luhman05}) \\
		& 30--50 Myr and 80--120 Myr (2 subgroups) & HR diagram (VI) + Li & L\'opez-Santiago et~al. (\cite{Lopez06}) \\
		& 38 Myr              & Dynamical age      & Makarov (\cite{Makarov07}) \\ 
		& 118 $\pm$ 20 Myr    & Dynamical age      & Ortega et~al. (\cite{Ortega07}) \\
\hline
\end{tabular}
\end{table}