The review question was clear and was supported by broad, but appropriate inclusion criteria. The search covered a range of relevant sources. The restriction of the review to published studies means that some relevant studies could have been omitted. Appropriate methods were used for study selection and quality assessment.
The synthesis was principally by thematic analysis, which was appropriate for primarily qualitative studies. Few details of the process and of the included study results were reported, which makes it difficult to comment in detail on the synthesis. The included studies were performed in a variety of settings and health systems, making their generalisability difficult to assess.
The authors appropriately highlighted the limitations of the included studies in addressing the main review question. Given these limitations, their cautious conclusions and recommendations for further research seem appropriate.