DOI 10.1136/neurintsurg-2019-014825
Acknowledgements We thank Susan Kaplan for editorial assistance and Anja Giger for the illustrations.
Contributors EIP: Author of the main manuscript. TD: Correction of the manuscript, diagnostic workup, image editing. JK: Correction of the manuscript, statistical evaluation. FZ: Correction of the manuscript, involved in the treatment. PJM:
Correction of the manuscript, involved in the treatment. SJ: Provided clinical data,clinical evaluation. UF: Operator of the stroke database, acute clinical evaluation.MA: Operator of the stroke database, clinical evaluation. SB: Data processing and
statistical input. MRH: Data processing and statistical input. JG: Study concept. PM:Senior author; study concept.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.