Comprehensive literature searches in bibliographic databases may produce thousands of records. The research team must organize, manage, and systematically and independently screen these results.
A variety of tools—free and for purchase--are available for managing SRs, and you may also use a citation manager such as EndNote.
The search results and the results of the screening process must both be thoroughly documented. The literature search process cannot begin until you have a system in place for organizing, managing, and screening search results.