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Table 3 Some currently available web-based tools that allow users to carry out post-processing of PubMed queries.

From: Anne O'Tate: A tool to support user-driven summarization, drill-down and browsing of PubMed search results

Type Site URL Features
TYPE 1: extract relationships and allow for 1) graphical visualization or navigation; or 2) refining queries AliBaba [15] Extract relationships between biological objects and map them into a graphical network
  BioIE [16] Extract informative sentences from retrieved results
  Chilibot [17] Extract biological relationships from search results
  ConceptLink [18] Extract relationships between medical concepts and allow graphical visualization
  PubNet [29] Extract several relationships from the search results and then map them into networks
  XplorMed [20] Extract dependency relations among words and allow users to refine queries using these words
TYPE 2: organize results by ontologies or hierarchies GoPubMed [21] Sort PubMed query results through Gene Ontology and MeSH hierarchy
  MEVA [22] Summarize search results according to MeSH hierarchy
  FABLE [23] Tag gene and protein occurrences in text
  PubReMiner [24] Categories include words, MeSH, authors, journals, year, substances and country
  PubMed Assistant [25] Lists MeSH and chemicals, with link-outs to PubMed, Google and Google Scholar
TYPE 3: cluster articles into categories Vivísimo ClusterMed [26] Cluster articles into several categories
  HubMed [27] Cluster related articles and allow for graphical visualization
TYPE 4: rank articles PubFocus [28] Rank articles by the journal impact factor and volume of forward references
  ReleMed [29] Rank articles by relevance