Patients with cluster headache show signs of insomnia and sleep related stress: results from an actigraphy and self-assessed sleep study.

"Declarations Ethics approvals and consent to participateThese studies were conducted in accordance with the declaration of Helsinki for research involving human subjects. All experiments were performed after obtaining ethical permit from the Swedish Ethical Review Authority (diary number 2014/656-31/4) and after informed consent from all study participants. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Open access funding provided by Karolinska Institute. This research work was supported by the Swedish Brain Foundation and the Mellby Gård Foundation (FO2020-0006 and FO2022-0001), Swedish Research Council (2017-01096), Karolinska Institutet Research Funds (2020-01411) Region Stockholm (ALF project) (20200095) and Magnus Bergvall foundation (2018-02920, and 2021-04413)."