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In this note we shortly comment on our analytical results inPRD73(2006)055003 for the $Z$ boson one-loop form factors contributing to theLepton Flavour Violating $Z$ penguin diagrams in SUSY. In a recentcommunication [arXiv:1312.5318v1] it has been pointed out a mistake in ourformulas for the chargino contribution to the $Z$-form factor, $F_L^{(c)}$, andthese authors have included corrections to our results in a way that we do notagree with. We wish to clarify here what are the correct results for these formfactors.

Remark on the one-loop Z form factors for LFV Z-penguin diagrams in SUSY