Text and Data Mining valid from 2018-07-27
Received: 28 February 2018
Accepted: 20 June 2018
First Online: 27 July 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Institute of Rheumatology in Prague and by the local ethics committee at the Karolinska Hospital Nord, Stockholm. Informed consent to participate was obtained from all participants.
: Not applicable as no individual personal data are included.
: The authors declare that they have no competing interests.
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