Subject: Closing out a clinical site following completion of all subject visitsI am searching for some information on when it is acceptable to conduct a close out visit for a clinical investigator once all subject visits are completed. I have read various positions :some say when all data is cleaned and the database is frozen,others say once all subjects have completed study activities. I am aware some IRBs have specific requirements as well which makes it easy to determine,but when an IRB leaves it up to the sponsor is when we have the question of when is it most appropriate.