NRR National Research Register 国家研究登记 NRR Noise Reduction Rating 噪音减弱等级,降低噪声级 NRR Nuclear Reactor Regulation 核反应堆的规定 ..
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这项回顾性研究采用了以色列国家外伤登记处提供的1998年至2006年住院的0到17岁外伤患者的数据。
This retrospective study used data from the Israeli National trauma Registry on patients aged 0-17 years hospitalized for trauma during 1998-2006.
所有的努力都是测定研究中每个患者的状况,包括联系国家登记部门。
Every effort was made to determine the status of each patient in this study, which included contacting national and state registries.
研究人员通过国家死亡登记表了解哪位受试者去世及其死亡原因。
The researchers have used national death records to learn which participants died, and why.
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