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European Qualitative research project on Patient-preferred outcomes in Early Rheumatoid Arthritis (EQPERA): rationale, design and methods of a multinational, multicentre, multilingual, longitudinal qualitative study.
Van der Elst K, Bremander A, De Groef A, Larsson I, Mathijssen EGE, Vriezekolk JE, Westhovens R, van Eijk-Hustings YJL. Van der Elst K, et al. Among authors: van eijk hustings yjl. BMJ Open. 2019 Mar 27;9(3):e023606. doi: 10.1136/bmjopen-2018-023606. BMJ Open. 2019. PMID: 30918031 Free PMC article.