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We would like to thank Dr Bizzaro for his commentary1 on our article2 on the variability of testing for antinuclear antibodies (ANA) by indirect immunofluorescence (IIF). Along with other letters that have been published in response to our article,3–9 Dr Bizzaro’s letter highlights the concerns about the IIF, its status as the ‘gold standard’ and the availability of other technologies (eg, solid phase assays) that …
Handling editor Josef S Smolen
Competing interests None declared.
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Provenance and peer review Commissioned; internally peer reviewed.
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