translation.en: We still need to complete the screening study using the low dose, and then our findings will need to be replicated at other institutions, and this could take five or more years.
translation.zh: 我们继续用低放射量完成整个扫描研究， 然后我们的成果将需要 其它研究机构重新检验。 这可能会耗费五年或更长时间。