31
Participants
Start Date
May 1, 2018
Primary Completion Date
November 23, 2021
Study Completion Date
November 23, 2021
botulinum toxin type A
Botulinum toxin type A, powder for solution, 25 international units (IU), injected towards the sphenopalatine ganglion using MultiGuide
placebo
solution without botulinum toxin A, injected towards the sphenopalatine ganglion using MultiGuide
Department of Neuroscience, Faculty of Medicine and Health Science, NTNU, Trondheim
St. Olavs Hospital
OTHER
Norwegian University of Science and Technology
OTHER