Correction to: Trials (2020) 21:359

https://doi.org/10.1186/s13063-020-4185-7

Following publication of the original article [1], the authors identified an error in Fig. 2. The correct Fig. 2 is given below.

Fig. 2
figure 1

Flow diagram showing baseline recruitment, allocation (2016) and endline retention (2018)

The original article has been corrected.