\label{fig:MissingMass} Distribution of the mass recoiling against the ${\rm b\bar b}$ system in the ${\rm b\bar b}\nu\bar\nu$ final state, from Higgs-strahlung (blue) and WW-fusion (red) production for $500~\infb$ at $\sqrt{s} = 350$~GeV, taken from Ref.~\cite{cite:durig}.