Vivisimo Bio Meta Cluster
http://demos.vivisimo.com/projects/BioMed

Type a query and Vivísimo will send your request to the PubMed, Harrison’s Online, MerckManual and TRIPDatabase search engines and parse and cluster the search results. The resulting left-side folders are made automatically from the returned titles and summaries. Clustering makes use of a proprietary General-Science and Biomedical knowledge base of synonyms, acronyms, spelling variants, and other meaning associations which help to interpret the search results. This has been added to Healthcare Resources Subject Tracer™ Information Blog. This has been added to Biological Informatics Subject Tracer™ Information Blog. This has been added to eHealthcareBot.