Correction to: Trials 22, 550 (2021)
https://doi.org/10.1186/s13063-021-05461-9
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Following the publication of the original article [1], we were notified that the Flu-iiQ™ table included in the supplementary material of original publication needs to be deleted. The authors were not at liberty to publish the table in full as a number of the items listed are confidential and commercially sensitive. For full details of the Flu-iiQ™ questionnaire please contact Measured Solutions P/L, PO Box 5127, Alphington VIC 3079, Australia (measuredsolutions.com.au).
The original article has been corrected.
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