Correction to: Trials 22, 537 (2021)

https://doi.org/10.1186/s13063-021-05489-x

Following the publication of the original article [1], we were notified that current affiliations 17, 18 and 19 were erroneously added to the first author rather than the senior author (Marzyeh Ghassemi).

The original article has now been corrected.