- Correspondence to Dr Erlin A Haacke, Department of Rheumatology & Clinical Immunology, University Medical Center Groningen, Hanzeplein 1 (AA21), 9713 GZ, Groningen, The Netherlands;
- Received February 10, 2017
- Revised June 1, 2017
- Accepted June 10, 2017
- First published July 14, 2017.
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