Here is a link for national and international resources:

• PubMed

If you have problems accessing the site, check the following page: https://www.ncbi.nlm.nih.gov/guide/browsers/

In November 2019, the National Library of Medicine of the United States of America officially presented the new release of PubMed, a free database that contains over 30 million citations and abstracts of biomedical literature. At the bottom of the page you will find a short presentation of the new PubMed, taken and translated from the NLM website.

At this link you will find further information and tutorials, including interactive ones, relating to the new PubMed:
https://learn.nlm.nih.gov/documentation/training-packets/T0022014P/

• MedlinePlus
• Google Scholar
• Allen Brain Atlas
• Supercourse (Epidemiology)
• Amedeo
• Dove e come mi curo