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Real world research
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【作者(必填)】Regina Kunz
【文题(必填)】Randomized trials and observational studies: still mostly similar results, still crucial differences
【年份(必填)】2008
【全文链接或数据库名称(选填)】htt ...
2017-9-21 20:01 - ihc7788c - 求助成功区