1. Crispim JC, Wastowski IJ, Faggioni LP, Costa R, Saber L, Donadi EA (2006) Microchimerism evaluation in recipients of living-related or unrelated deceased allograft renal transplants. Transplant Proc 38:2828–2830
2. Davies JD, Martin G, Phillips J, Marshall SE, Cobbold SP, Waldmann H (1996) T cell regulation in adult transplantation tolerance. J Immunol 157:529–533
3. Nikolic B, Sykes M (1996) Clonal deletion as a mechanism of transplantation tolerance. J Heart Lung Transpl 15:1171–1178
4. Kovats S, Main EK, Librach C, Stubblebine M, Fisher SJ, De Mars R (1990) A class I antigen, HLA-G, expressed in human trophoblasts. Science 248:220–223
5. Houlihan J, Biro P, Harper H, Jenkinson H, Holmes C (1995) The human amnion is a site of MHC class Ib expression: evidence for the expression of HLA-E and HLA-G. J Immunol 154:5665–5674