About the Authors

Lisanne J. Balk

L.balk@vumc.nl

Affiliation MS Centre Amsterdam, VU University Medical Centre, Amsterdam, The Netherlands

Willemien A. E. J. de Vries–Knoppert

Affiliation Department of Ophthalmology, VU University Medical Centre, Amsterdam, The Netherlands

Axel Petzold

Affiliations MS Centre Amsterdam, VU University Medical Centre, Amsterdam, The Netherlands, UCL Institute of Neurology, Queen Square, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LB WV AP. Performed the experiments: LB AP. Analyzed the data: LB AP. Contributed reagents/materials/analysis tools: LB AP. Wrote the paper: LB WV AP.