  We fit the invariant mass distribution of
${X(3872)}\rightarrow{J}/{\psi}\pi^+\pi^-$ from LHCb and
${X(3872)}\rightarrow{D}^{0}\overline{D}^{0*}$ from Belle using the propagator
for S-wave threshold states in effective field theory. In this way, we can
directly determine the $Z$ which is the probability of finding the compact
component in ${X(3872)}$.
