[Development of a geographic filter for PubMed to identify studies performed in Spain].
INTRODUCTION AND OBJECTIVES: The increasing size of the PubMed (Medline) database has made it necessary to develop specific tools for information retrieval (i.e., filters). The current configuration of the Limits option in PubMed does not enable searches to be limited according to geographic criteria. Our objectives, therefore, were a) to develop a geographic filter for the retrieval from PubMed of studies performed in the Spanish population, and b) to assess its performance. METHODS: A seco...Expand abstract
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