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.

BMJ Open. 2019 Mar 27;9(3):e023606. doi: 10.1136/bmjopen-2018-023606.

PMID: 30918031