%0 Journal Article %T Non-invasive vagus nerve stimulation for PREVention and Acute treatment of chronic cluster headache (PREVA): A randomised controlled study %A Gaul, Charly %A Diener, Hans-Christoph %A Silver, Nicholas %A Magis, Delphine %A Reuter, Uwe %A Andersson, Annelie %A Liebler, Eric J %A Straube, Andreas %A , %J Cephalalgia %V 36 %N 6 %P 534-546 %@ 0333-1024 %D 2015-09-21 %I SAGE Publications %~ DeepDyve