But a recent study warned that more children than necessary are being exposed to radiation this way.

VOA: special.2009.10.28

The Nurses' Health Study is more recent and a very prominent study as well.

护士健康研究是一项新近的,也是非常杰出的研究

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The Nurses' Health Study is more recent and a very prominent study as well.

护士健康研究是一项新近的,也是非常杰出的研究

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选