Supplemental Material1 - Supplemental material for The diagnostic accuracy of headache measurement instruments: A systematic review and meta-analysis focusing on headaches associated with musculoskeletal symptoms

Supplemental material, Supplemental Material1 for The diagnostic accuracy of headache measurement instruments: A systematic review and meta-analysis focusing on headaches associated with musculoskeletal symptoms by Hedwig A van der Meer, Corine M Visscher, Tom Vredeveld, Maria WG Nijhuis van der Sanden, Raoul HH Engelbert and Caroline M Speksnijder in Cephalalgia