Table 2. A quality appraisal using SANRA.

Study	Importance to readers	Aims of the narrative reviews	Description of the literature search	Referencing	Scientific reasoning	Appropriate presentation of data	Total score
South and Rodgers 2017 [7]	2	2	0	2	2	2	10
White et al. 2014 [8]	2	2	0	2	1	2	9