美国食品药物管理局（FDA)引用了独立国家癌症研究所的一项方案成果，尽管使用手机的使用量急剧上升，1987年至2005年间，脑癌发生的数量并没有增加。

FDA also cites a separate National Cancer Institute program finding that, despite the dramatic increase in cell phone use, occurrences of brain cancer did not increase between 1987 and 2005.

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不过，“智库”美国企业研究所的莱因哈特表示，他还在美联储工作时对这些方案进行过研究，若资产负债数目足够大就会奏效。

Still, Vincent Reinhart, who studied such policy options while at the Fed and is now at the American Enterprise Institute, a think-tank, believes they will work if they are big enough.

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目前他正与国家太空生物医学研究所合作，共同研制一套训练方案来缩短适应期。

He's working with the National Space Biomedical Research Institute to create a training system to speed up that transition.

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