Show the impact factor (IF) and JCR quartile information (Q1 - Q4) of the journals in PubMed web pages; Filter the search results by impact factors or JCR quartile of journals; Expand or Collapse the snippet; Show or Hide the abstract. Sep. 17th updates: - Update the database of impact factors to the 2020 version - Optimizations. Oct. 20th 2020 updates: - Optimizations. Oct. 6th 2020 updates: - Expand or Collapse the snippet; Show or Hide the abstract. Aug. 26th 2020 updates: - Add data of some missing journals. Now our database covers most of the journals in PubMed. - Show the JCR quartile information (Q1 - Q4) for each journal - Add checkboxes to filter search results based on the journal of JCR quartile July 26th 2020 updates: - Update the database of impact factors to the 2019 version - Bug fixes July 18th 2020 updates: - Update to reflect the changes on PubMed web page tag names - Bug fixes June 27th 2020 updates: - Added data of some missing journals in our google spreadsheet - Simplified by removing the support to old PubMed - Bug fixes Feb 24 2020 updates: - Using a slide to set IF filter in the filter panel of the webpage (See option) - Bug fixes Feb 20 2020 : Updated to support the legacy PubMed. - Abstract Preview. - Copy citation to clipboard. Feb 19 2020 : Updated for the new Pubmed. - Add a direct link to PMC webpage for the free PMC articles. - Add impact factor filter to the left setting panel of the webpage.