Clinical trials or individual research studies published in the journal literature form the foundation of scientific evidence, but not all research meets the highest standards of quality. This means that if you locate relevant individual research articles in CINAHL or PubMed, another step (STEP 3-Appraise the Evidence) is required to determine the quality of a study.
Search the CINAHL Nursing database (EBSCO)
Search The National Library of Medicine (no login required)