Chirp stimulation–H-response short and dynamicSS6-L2Gantenbein, A. R.Goadsby, P. J.Kaube, H.Author information1Headache and Pain Unit, Deparment of Neurology, University Hospital Zurich, Switzerland2Headache Group, Institute of Neurology, London, UKCephalalgia 25(12):p 1196-1197, December 2005.Copyright © 2005 Blackwell Publishing Ltd.