3Massague J, Cheifetzs S, Laiho M, et al.Transforming growth factor-beta [J] .Cancer surv, 1992, 12: 81-103.
4Clark DA, McDermott M, Szewzuk MR. Impairment of host -versusgraft reaction in pregnant mice. Ⅱ .Selective suppression of cytotoxic T-cell generation correlates with soluble suppressior activity and with successful allogeneic pregnancy [J]. Cell Immunol, 1980:52 (1) : 106-118.
5Clark DA, Coker R. Transforming growth factor-beta (TGF-beta) [J]. Int J Biochem Cell Biol, 1998, 30(3) : 293-298.