Correction to: BMC Health Serv Res

https://doi.org/10.1186/s12913-019-4558-3

Due to an error introduced during typesetting of this article [1], there are two corrections about the figures. 1. The caption of Fig. 1 should be changed to “Study design”. 2. The Fig. 2 is missing.

Fig. 1
figure 1

Study design

Fig. 2
figure 2

PBF theory of change

The original article has been corrected.