Correspondence to Professor Clara Crescioli, Department of Movement, Human and Health Sciences, Section of Health Sciences, Università degli Studi di Roma “Foro Italico”, Rome 00135, Italy; ...
Correspondence to Professor Annette van der Helm-van Mil, Rheumatology, Leiden University Medical Center, Leiden 2300 RC, The Netherlands; A.H.M.van_der_Helm{at}lumc.nl Rheumatoid arthritis (RA) is ...