- Correspondence to Dr Andreas Kerschbaumer, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria;
- Received November 17, 2019
- Revised January 7, 2020
- Accepted January 8, 2020
- First published February 7, 2020.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.