In sandwich ELISAs, no significant cross-reactivity or interference with recombinant human (rh) TGF-alpha, hTGF-beta 1, porcine (p) TGF-beta 1, rhTGF-beta 1, pTGF-beta 1.2, pTGF-beta 2, recombinant chicken TGF-beta 3, rhTGF-beta 3, recombinant amphibian