Hsing是国家癌症研究所癌症流行病学和遗传学部门的一员。

Hsing is from the division of cancer epidemiology and genetics at the National cancer Institute.

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根据美国国家癌症研究所对一系列儿童癌症患者的统计，在1975年到2005年间，平均五年存活率已经从58%上升到了81%。

The average five-year survival rate for a range of childhood cancers increased from 58 percent to 81 percent between 1975 and 2005, according to statistics from the National cancer Institute.

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自此，一些主要的医疗机构，如美国国家癌症研究所和癌症学会，都对这一说法进行反驳。

Since then, major medical institutions, such as the National Cancer Institute and the ACS, have refuted the claim.

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