9Moher D, Cook D J, Eastwood S, et al. Improving the quality of reports of meta-analyses of randomized controlled trials: the QUOROM statement. Quality of Reporting of Meta-analyses [ J ]. Lancet, 1999, 354: 1896-1900.
10Fowler B A, Kimmel C A, Woods J S, et al. Chronic low-level lead toxicity in the rat. III An integrated assessment of long-term toxicity with special reference to the kidney [ J ]. Toxicol Appl Pharrnacol, 1980, 56: 59-77.
