8Jadad AR, Moore RA, Carroll D, et al. Assessing the quality of reports of randomized clinical trials is blinding necessary [J]. Control Clin Trials, 1996, 17(1):1-12.
9Zhang MY, Miao L, Li Ys, et al. Meta-analysis of the methy- lenetetrahydrofolate reductase C677T polymorphism and susceptibility to Alzheimer's disease[J]. Neurosci Res, 2010, 68(2): 142-150.