As a note to reading the original research papers on medical science (and any other fields): I use Google Scholar to track down things for a gardening site I work for. There is a research part of the site where I can share summaries and abstracts of papers (that usually cost to download if you're not a subscriber to the scholarly journal). We do the fair use process of posting the abstract and a link to the paper if anyone wants to buy it.

Today I used Google's Chrome Extension called Unpaywall that searches university library repositories and other scholarly locations (i.e., governmental institutes) for free versions of the paid articles. It took universities a while to catch on, but many of them now have their own library repositories so the next to last version of the paper to be published can be stored in a way the school that pays the researchers can use the paper without paying the subscription fee to use it. Google compares authors and content and comes back with an email and a spreadsheet with a field that includes the link to the repository if it is parked in one. There are several ways to send the query, and the results are sent in a spreadsheet to your email address.

https://chrome.google.com/webstore/detail/unpaywall/iplffkdpngmdjhlpjmppncnlhomiipha