Zeitschrift für RheumatologieNovember 2015, Volume 74, Issue 9, pp 829–833 | Cite asMitteilungenMitteilungen der DGRhFirst Online: 12 November 2015 47 Downloads This is a preview of subscription content, log in to check access.PreviewUnable to display preview. Download preview PDF.Unable to display preview. Download preview PDF.Copyright information© Springer-Verlag Berlin Heidelberg 2015