Correction: BMC Trials 22, 851 (2021)

https://doi.org/10.1186/s13063-021-05777-6

Following publication of the original article [1], we have been informed that the correct name of Dr. Marta is Marta Fernández-González, not Marta González-Fernández.

Secondly, an additional source of funding was added in the "Funding" section of the Administrative information table.

The original article has been corrected.