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Ann Rheum Dis. 2018 Dec 30. pii: annrheumdis-2018-214892. doi: 10.1136/annrheumdis-2018-214892. [Epub ahead of print]

Response to: 'Catching the falling star: points to consider when using propensity scores' by Ouyang et al.

Author information

1
Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands s.a.bergstra@lumc.nl.
2
Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands.
3
Amsterdam Rheumatology & Immunology Center, Amsterdam, The Netherlands.
4
Zuyderland Medical Center, Heerlen, The Netherlands.

KEYWORDS:

disease activity; epidemiology; treatment

Conflict of interest statement

Competing interests: None declared.

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