Notes
*The article has been co-published with permission in Rheumatology, The Journal of Rheumatology, Clinical Rheumatology, Rheumatology International, Modern Rheumatology, Zeitschrift für Rheumatologie and Reumatología clínica. All rights reserved in respect of Rheumatology, © The Authors 2016. For The Journal of Rheumatology, © The Journal of Rheumatology 2016. For Clinical Rheumatology, © Clinical Rheumatology 2016. For Rheumatology International and Zeitschrift für Rheumatologie, © Springer-Verlag GmbH Berlin Heidelberg 2016. For Modern Rheumatology, © Japan College of Rheumatology 2016. For Reumatología clínica, © Elsevier España, S.L.U. Barcelona, 2016.