Peer-reviewed articles written by authors who actually performed an original experiment or are recording their field observations, i.e. of organisms or medical patients.
Peer-reviewed articles written by authors who summarize or discuss trends in the primary literature. In the life science field, these are called "review" articles or "reviews".
Non-peer-reviewed articles, books, newspaper articles, encyclopedia entries, etc. (your background information likely falls into this category)
EID login required
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 Generic License.