Home Documents GHTF final documents GHTF Study Group 4 - Auditing GHTF Study Group 4 - Auditing GHTF final documents GHTF media releases GHTF Steering Committee GHTF Study Group 1 - Pre-market Evaluation GHTF Study Group 2 - Post-market Surveillance/Vigilance GHTF Study Group 3 - Quality Systems GHTF Study Group 4 - Auditing GHTF Study Group 5 - Clinical Safety/Performance There are no final documents for the GHTF Study Group 4. For a list of archived documents, see GHTF Archived Documents.