To address theses problems, McMaster's Health Information Research Unit (Hamilton, Ontario, Canada) has developed and implemented "McMaster Premium LiteratUre Service Federated Search (MPFS)", an online search engine that provides a unique 1-stop search and organized access to current best evidence in daily practice. MPFS provides both alerts to users about new research in their chosen disciplines, and a novel federated search function, with the particular feature of organizing information according to the "pyramid of evidence-based resources", with the most clinically applicable evidence at the top. Thus MPFS simultaneously retrieves evidence from Studies ("Medline", both filtered and unfiltered, at the bottom), then Systematic reviews; Synopses of studies and systematic reviews (selected for methodological rigor and clinical relevance), and, at the top level, online widely used Summaries (e.g."Best Practice").