Abstract
The authors regret that Fig. 1 contained formatting errors, where the arrows leading to the exclusion criteria boxes were misaligned. In addition, the value for the number of articles excluded during the full text records review was incorrect. The figure presented below contains the correctly formatted flow chart depicting the study selection process and the correct value of articles excluded during full text record review. The authors would like to apologise for any inconvenience caused. [Figure presented] Fig. 1: Flow diagram of study selection process.
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