Text and Data Mining valid from 2018-12-01
Received: 6 February 2018
Accepted: 10 December 2018
First Online: 19 December 2018
Ethics approval and consent to participate
: The study was conducted in accordance with the Helsinki Declaration. Ethical review committee approval was obtained from the city government of Vienna (ERB no.: EK-13-190-VK). Participants received detailed information about the study and written informed consent was obtained from each patient before enrolment.
: This manuscript does not contain individual person’s data in any form.
: The study was supported by the Karl Landsteiner society - institute for rheumatic and autoimmune disease. The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.