1. Cardiac monitoring of high-dose verapamil in cluster headache: An international Delphi study. (December 2016) Authors: Koppen, H; Stolwijk, J; Wilms, EB; van Driel, V; Ferrari, MD; Haan, J Journal: Cephalalgia Issue: Volume 36:Number 14(2016) Page Start: 1385 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗