对照实验

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

SANAD在英国医院门诊进行的开放随机对的。

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

方法用邻联甲苯胺和便隐血检试纸分别检200例粪标本进行对并分析。