- Correspondence to Professor Frédéric A Houssiau, Rheumatology Department, Cliniques Universitaires Saint-Luc, Pôle de Pathologies Rhumatismales Inflammatoires et Systémiques, Université catholique de Louvain, Bruxelles 1200, Belgium;
- Received October 2, 2015
- Accepted October 31, 2015
- First published November 20, 2015.
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