Before revision: Clincal Trial Transparency, a 2017 policy guide, argues for registration Clinical trial registration is the practice of documenting clinical trials before they are performed in a clinical trials registry so as to combat publication bias and selective reporting
After revision: Clincal Trial Transparency, a 2017 policy guide, argues for registration Clinical trial registration is the practice of documenting clinical trials before they are performed in a clinical trials registry so as to combat publication bias , selective reporting, and to reduce data dredging.or preregistration