纵向面调查
A longitudinal survey of self-assessed health trends in a community cohort of people with multiple sclerosis and their significant others
一项社区多发性硬化症患者队列及其相关人员自我健康趋向评估的纵向研究
This same group also participated in an IQ test in1980 as part of their enrollment in the National Longitudinal Survey of Youth.
同样是这群人还曾参加了1980年的一次IQ测试,作为国家青年长期追踪调查项目登记入伍的一部分。
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