- Correspondence to Professor Joachim Sieper, Medical Department I, Rheumatology, Charite Universitatsmedizin Berlin, Berlin 12200, Germany;
- Received June 1, 2021
- Accepted June 9, 2021
- First published June 18, 2021.
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.