研究结果发现，研究中作为对照组的健康人中有近4%也感染了这种名为XMRV的病毒，研究人员对此担心不已。

Researchers are just as concerned about the finding that nearly 4% of healthy people used as controls in the study were also infected with the virus, called XMRV.

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另选96名健康志愿者作为对照组，利用食物过敏原皮内试验法进行鉴定。

Then 96 healthy volunteers were chosen as matched group. Make an appraisal with intradermal tests of food sensitinogen.

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选取43例无肺部疾患健康者作为对照组。

Selected 43 healthy subjects without pulmonary disease as control group.

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