检索相关科学文献，为每个发病率组检索出基于人群监测研究并采用实验室检查确诊的病例数据。
Population-based surveillance studies using laboratory-confirmed cases were sought for each incidence group by a computerized search of the scientific literature.
研究方法：根据1992 - 2002年该地区土地利用变化数据，采用相关分析的方法。
Method of correlation analysis was applied using the data of land use change from 1992to 2002.
最后一个关键的变化是采用高复制数据存储(high replication datastore)作为默认选项，这就减少了与选项相关的成本。
The last key change is the adoption of the high replication datastore as the default option, as well as reducing the costs associated with the option.
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