Primary and secondary non-response: in need of operational definitions in observational studies

Ann Rheum Dis. 2021 Aug;80(8):961-964. doi: 10.1136/annrheumdis-2021-220202. Epub 2021 Apr 21.

¹ Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Zurich, Switzerland.
² Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
³ Department of Rheumatology, University Hospital of Zurich, Zurich, Switzerland.
⁴ Division of Rheumatology, University Hospitals of Geneva, Geneva, Switzerland.
⁵ Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Zurich, Switzerland andrea.burden@pharma.ethz.ch.

No abstract available

Keywords: biological therapy; epidemiology; rheumatoid arthritis.

Publication types