- Correspondence to Dr Lene Dreyer, , Center for Rheumatology and Spine Diseases, Rigshospitalet, Gentofte University Hospital, Hellerup 2900, Denmark;
- Received 17 July 2017
- Revised 30 October 2017
- Accepted 20 November 2017
- Published in print 5 December 2017.
- Published online 7 December 2017.
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