1.SANAD was an unblinded randomised controlled trial in hospital-based outpatient clinics in the UK.

1.SANAD在英国医院门诊进行的开放随机对照的实验。

2.Methods To detect the sed occult blood of 200 specimens with both ortho-tolidine method and immunogold method.then analyse the results.

2.方法用联甲苯胺和便隐血胶体金检测试纸分别检测200例进行对照实验并分析。