The study of Graverholt et al, 2014 is a systematic review of 45 published articles.
A systematic review is a summary of the medical literature that uses explicit and reproducible methods to systematically search, critically appraise, and synthesize a specific issue.
In this study, 54 works of literature were selected from various sources. After assessing all the published full articles, 4 systematic reviews and 5 primary studies were included in the systematic review.
The main objective of the systematic review is that by using all the available primary data for a meticulous summing up of 'secondary research' to answer the research question.
Learn more about Systematic review on
https://brainly.com/question/27974953
#SPJ4
