Text and Data Mining valid from 2019-04-08
Received: 5 February 2019
Accepted: 29 March 2019
First Online: 8 April 2019
Ethics approval and consent to participate
: The study conformed to the revised ethical principles of the Helsinki declaration and the Codex rules and guidelines for research. The present study is based on patients who participated in the outpatient assessment and treatment program in the Headache Medical Center Linz and the Headache Center at the University of Athens. During their first appointment in the Headache Center, all patients participating in the survey provided written informed consent to use their data for the quality control, and to publish the data in anonymized form as part of the quality control process. Therefore, an ethics approval was not obtained for the present analysis.
: Written informed consent was obtained from the patient for the publication of this report.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.