A<unk>  (DCF) or data query<unk>  is a questionnaire specifically used in clinical research. The DCF is the primary data<unk>  tool from the trial sponsor or contract research organization (CRO) towards the investigator to clarify discrepancies and ask the investigator for<unk> . The DCF is part of the data validation process in a clinical trial.
Data clarification form
Safety data sheet
Procedure code
E chart
Community rating
Clinical data management system
Continuity of Care Record
Patient tracking system