aInstitute of Pharmacology and Toxicology, University of Zurich, Zürich, Switzerland
bInstitute of Pharmaceutical Sciences, ETH Zurich, Zürich, Switzerland
cDepartment of Anesthesiology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
dDepartment of Neurology, Danish Headache Center, Glostrup Research Institute, Glostrup, Denmark
Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.
Received April 20, 2018
Accepted April 24, 2018