Alternatively, if you know the name of a guideline or organisation that publishes guidelines on a particular specialty, you can search for the guideline or organisation in Google.
Clinical Trial Registers
Dissertations and Theses
Grey Literature Guidance
Health and Statistics
Medical Associations and Organisations Worldwide
Research papers that appear prior to the completion of full peer review. They are not as extensively validated as peer reviewed publications and so their data or findings should not be used to inform clinical practice. However, the research they contain will be of interest to those seeking the latest or emerging research in their field. Preprints have proven to be very significant in the early dissemination of Covid-19 related work. Preprints are published on:
Preprint Servers, such as those which appear below.
PMC (PubMed Central) has since June 2020 been making certain Preprints openly available on their database.
Europe PMC - Searches across all these preprint sources, as well as other Open Access content, can be made on Europe PMC.