Usual care and a self-management support programme versus usual care and a relaxation programme for people living with chronic headache disorders: a randomised controlled trial protocol (CHESS).
Shilpa PatelFelix AchanaDawn CarnesSandra EldridgeDavid R EllardAnne-Marie SlowtherKirstie HaywoodSiew Wan HeeDipesh MistryHema MistryVivien P NicholsStavros PetrouTamar PincusRachel PotterHarbinder Kaur SandhuKimberley StewartStephanie Jane Caroline TaylorMartin UnderwoodManjit MatharuPublished in: BMJ open (2020)
ISRCTN79708100.