Preferred Reporting Items for Systematic Reviews and Meta ...
The PRISMA Statement (Items 5, 11, 16, and 23) acknowledges this iterative process. Aside from Cochrane reviews, all of which should have a protocol, only about 10% of systematic reviewers report working from a protocol . Without a protocol that is publicly accessible, it is difficult to judge between appropriate and inappropriate modifications.
DA: 5 PA: 10 MOZ Rank: 79