  In Phys. Rev. Lett. 89, 180401 (2002) [cond-mat/0204504], Kokkelmans and
Holland interpret the results of a recent experiment at JILA that demonstrated
atom-molecule coherence in a Bose-Einstein condensate. Using a mean-field
approximation to a resonance field theory involving an atom condensate and a
molecular condensate, they find that the molecular condensate is tiny compared
to the atom condensate. We show that if the probability for the molecular field
to create a diatomic molecule is correctly included, the numbers of atoms in
the atom condensate and in the condensate of diatomic molecules are comparable.
