In sandwich ELISAs, no cross-reactivity or interference is observed with recombinant mouse (rm) EGF, bovine FGF acidic, bovine FGF basic, recombinant human (rh) G-CSF, rhGM-CSF, rmGM-CSF, rhLIF, human PDGF, porcine PDGF, rhTGF- alpha, hTGF-beta 1, pTGF-b