Differential effects of transforming growth factor-beta 1 on the expression of matrix metalloproteinases and tissue inhibitors of metalloproteinases in young and old human fibroblasts. - Edwards,D.R.; Leco,K.J.; Beaudry,P.P.; Atadja,P.W.; Veillette,C.; Riabowol,K.T. (Exp Gerontol, 1996)