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Line 1: {{nofootnotes\|date=November 2010}} A '''Data Clarification Form''' (DCF) or Data Query Form (DQF) is a questionnaire specifically used in [[Clinical trial\|clinical research]]. The DCF is the primary data clarification tool from the trial sponsor or Contract Research Organization (CRO) towards the investigator to clarify discrepancies and ask the investigator for clarification. The DCF is part of the data validation process in a clinical trial.

Data clarification form: Difference between revisions