...threshold

n.b. this is not a good assumption for the charged channel above 400 MeV.

...are

the sign of the amplitudes is a matter of convention; some others use the opposite sign for the neutral one.

...couplings

These coupling parameters also arise in two and higher loop 342#342PT . For example, in the two loop calculation [24] the 343#343 couplings of the scalar and tensor resonances are included as well as the 344#344 couplings of the vector and axial vector mesons and the usual Chiral Lagrangian parameters 345#345.

...illustrative

note that the values quoted in Ref. 6 are for 382#382 and are in different units.

...of

thereby dramatically affecting their contributions to Eq. (6) of Ref. 31.

Carlos E.Piedrafita