This Literature Review is really quite small, only requiring 2-5 pages.  The review is not a collection of your opinions, instead details about your topic supported by peer-reviewed (scholarly) publications or in some cases professional/trade materials (like AHIMA, HIMSS, AMIA) or non-profit and governmental organizations.  A rule of thumb is 10 sources per page – I’m not grading on volume however it gives you an idea of how you should be supporting your thoughts.

This 2-5 review should include;

• sources/ideas directly related to your topic
• sources recently published (within 10 years unless there is a specific reason for using an older source)
• reliable sources (peer-reviewed, professional, governmental, non-profit)
• cited correctly 

This might be a good place to begin – https://www.libraries.rutgers.edu/health-sciences