7Neugebauer S, Baba T, Watanabe T, et al. Methylenete- trahydrofolate reductase gene polymorphism as a risk factor for diabetic nephropathy in NIDDM patients [J]. Lancet, 1998, 352(9126):454.
8Stabler SP, Estacio R, Jeffers BW, et al. Total homocysteine is associated with nephropathy in non-insulin-dependent diabetes mellitus[J]. Metabolism,1999,48(9) : 1096 - 1101.