Outcome measures for assessing the effectiveness of non-pharmacological interventions in frequent episodic or chronic migraine: a Delphi study.
Kerstin LüdtkeAnnika BasenerStephanie BedeiRene CastienAleksander ChaibiCleofas Rodriguez-BlancoCesar Fernández-de-Las-PeñasMirja GustafssonToby HallGwen JullPeter KroppBjarne K MadsenBenjamin SchaeferElizabeth SengClaudia SteenPeter TuchinHarry von PiekartzBettina WollesenPublished in: BMJ open (2020)
German Register of Clinical Trials (DRKS00011777).