One group was given a drug while the other group received a harmless substance instead of medicine without their knowledge.

一组服用药物，而另一组在不知情的情况下服用无害的药物。

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Beta-carotene, for its part, kept cognition and memory from declining in a group of doctors who took part in an 18-year study published in the Archives of Internal medicine.

一组医生在18年的研究调查后，于《内科医学档案》发文：贝塔胡萝卜素则可以防止人的记忆和认知能力下降。

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White people age 40 to 64 have "recently emerged as a new high-risk group for suicide," according to the study in the American Journal of Preventive Medicine.

40岁到64岁的白人是最近新近出现自杀高风险的人口群，美国《Preventive Medicine》的一项研究表明。

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The Center for Medicine in the Public Interest is a group in New York supported in part by the drug industry.

VOA: special.2010.02.22

Yet the plant is part of a group called Digitalis that is used in medicine to treat heart problems.

VOA: special.2009.08.25

The American Society for Reproductive Medicine, a trade group representing fertility doctors, doesn't have a policy on doctors making the loans.

WSJ: In Vitro a Fertile Niche for Lenders

The Institute of Medicine, a group that uses scientific research to formulate public health policies, currently recommends an Adequate Intake, or AI, rather than a specific daily amount of vitamin D.

CNN: Vitamin D is hot! Here's how to get it

Despite the recent tensions, South Korea last week approved the first shipment of humanitarian aid to North Korea since Ms. Park took office, allowing a local charity group to send tuberculosis medicine.

WSJ: North Korea Severs Major Line to South