Design and implementation of Metta, a metasearch engine for biomedical literature retrieval intended for systematic reviewers.
Design and implementation of Metta, a metasearch engine for biomedical literature retrieval intended for systematic reviewers.
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DOI：
10.1186/2047-2501-2-1
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发表时间：
2014
影响因子：
6
通讯作者：
Meng W
中科院分区：
文献类型：
--
作者：
Smalheiser NR;Lin C;Jia L;Jiang Y;Cohen AM;Yu C;Davis JM;Adams CE;McDonagh MS;Meng W
撰写循证医学系统综述和荟萃分析的个人和团体经常在链接到不同书目数据库的多个搜索引擎上进行文献搜索，因此迫切需要一个合适的元搜索引擎来节省重复搜索的时间，并从最初的考虑中删除重复的出版物。不像一般的用户通常进行搜索来找到一些高度相关（或最近的）文章，系统审稿人寻求获得关于给定主题的一组全面的文章，满足特定的标准。这给元搜索引擎的设计和实现带来了特殊的要求和挑战。我们创建了一个联邦搜索工具，它连接到五个数据库：PubMed， EMBASE， CINAHL， PsycINFO和Cochrane中央对照试验登记。检索到的书目记录在网上显示；还可以选择对结果进行重复数据删除，并以BibTex和XML格式导出。根据我们团队内部用户的反馈，我们对查询界面进行了广泛的修改。除了一般的搜索轨道和一个专注于人类相关文章的搜索轨道，我们还添加了优化的搜索轨道，以识别病例报告和系统评论。虽然用户可以修改预设的搜索选项，但在实践中，它们很少被修改。可以在几分钟内导出多达几千条检索到的记录。从多个数据库返回的记录的重复删除以优先的方式进行，有利于保留从PubMed返回的引用。系统审查器习惯于使用特定于单个数据库的策略和搜索标记来制定复杂的查询。Metta提供了一种不同的方法，可以节省大量时间，但需要修改当前的搜索策略，并对随机对照试验文章进行更好的索引。我们设想Metta是一个多工具管道的一部分，它将帮助系统审稿人检索、过滤和评估出版物。因此，Metta可能对任何正在进行全面生物医学文献搜索的人都有广泛的用处。本文的在线版本（doi:10.1186/2047-2501-2-1）包含补充材料，可供授权用户使用。
Individuals and groups who write systematic reviews and meta-analyses in evidence-based medicine regularly carry out literature searches across multiple search engines linked to different bibliographic databases, and thus have an urgent need for a suitable metasearch engine to save time spent on repeated searches and to remove duplicate publications from initial consideration. Unlike general users who generally carry out searches to find a few highly relevant (or highly recent) articles, systematic reviewers seek to obtain a comprehensive set of articles on a given topic, satisfying specific criteria. This creates special requirements and challenges for metasearch engine design and implementation. We created a federated search tool that is connected to five databases: PubMed, EMBASE, CINAHL, PsycINFO, and the Cochrane Central Register of Controlled Trials. Retrieved bibliographic records were shown online; optionally, results could be de-duplicated and exported in both BibTex and XML format. The query interface was extensively modified in response to feedback from users within our team. Besides a general search track and one focused on human-related articles, we also added search tracks optimized to identify case reports and systematic reviews. Although users could modify preset search options, they were rarely if ever altered in practice. Up to several thousand retrieved records could be exported within a few minutes. De-duplication of records returned from multiple databases was carried out in a prioritized fashion that favored retaining citations returned from PubMed. Systematic reviewers are used to formulating complex queries using strategies and search tags that are specific for individual databases. Metta offers a different approach that may save substantial time but which requires modification of current search strategies and better indexing of randomized controlled trial articles. We envision Metta as one piece of a multi-tool pipeline that will assist systematic reviewers in retrieving, filtering and assessing publications. As such, Metta may find wide utility for anyone who is carrying out a comprehensive search of the biomedical literature. The online version of this article (doi:10.1186/2047-2501-2-1) contains supplementary material, which is available to authorized users.