不少精心组织的长期随机人体试验表明，与从未被筛查人群相比，被筛查、诊断和治疗的人群几乎没有获得任何生存优势。
Several well-managed, randomized, long-term human trials have shown almost no survival benefit for those who are screened, diagnosed, and treated, compared to those who were never screened.