Research articles will generally have some version of the following headings, however you may not see all of these and you may see some that are not listed.
A refereed or peer reviewed publication is one that has been evaluated by experts the field prior to publication. Refereed materials are significant to the research and the literature of most academic fields because they assure readers that the information conveyed is reliable and timely.
In contrast, articles submitted to non-refereed materials such as Trade Journals or Magazines are accepted or rejected based on the judgement of the editor.
The term "scholarly publication" is often used to describe refereed materials, but this term is not exclusive to refereed material. Non-refereed materials may not by scrutinized as intensely as refereed materials, but they can still be considered scholarly.
Most biomedical research is reported/published in academic or scholarly (refereed) publications and and the articles have completed the peer-review process.
To determine if a journal is refereed, you can;