About the Authors

Elisabeth A. Wibroe

elisabeth.arnberg@gmail.com

Affiliation Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Glostrup, Denmark

Hanne M. Yri

Affiliation Danish Headache Center, Department of Neurology, Rigshospitalet, University of Copenhagen, Glostrup, Denmark

Rigmor H. Jensen

Affiliation Danish Headache Center, Department of Neurology, Rigshospitalet, University of Copenhagen, Glostrup, Denmark

Morten A. Wibroe

Affiliation Department of Pediatrics and Adolescent Medicine and department of Neurosurgery, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

Steffen Hamann

Affiliation Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Glostrup, Denmark

Competing Interests

HMY has received honoraria for consultant work from NeuroCore and a travel grant from Berlin-Chemie Menarini. RHJ has received honoraria for lectures and patient leaflets from MSD, Berlin-Chemie Menarini, ATI and Pfizer and serves on medical advisory boards for LindeGas, ATI and Neurocore. This does not alter the authors’ adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: EAW HMY RHJ SH. Performed the experiments: EAW HMY. Analyzed the data: EAW HMY RHJ MAW SH. Contributed reagents/materials/analysis tools: HMY RHJ SH. Wrote the paper: EAW.