  In this talk I present the results obtained using effective field theories in
a finite volume from a reanalysis of lattice data on the $KD^{(*)}$ systems,
where bound states of $KD$ and $KD^*$ are found and associated with the states
$D^*_{s0}(2317)$ and $D^*_{s1}(2460)$, respectively. We confirm the presence of
such states on the lattice data and determine the weight of the $KD$ channel in
the wave function of $D^*_{s0}(2317)$ and that of $KD^*$ in the wave function
of $D^*_{s1}(2460)$. Our results indicate a large meson-meson component in both
cases.
