Table 1. Quality appraisal using the SANRA tool.

SANRA: Scale for the Assessment of Narrative Review

SANRA	Ference et al., 2018 [3]	Kamanna et al., 2008 [17]	Franchini et al., 2016 [18]	Malick et al., 2018 [19]
Justification of the article’s importance for the readership	2	2	2	2
Statement of concrete aims and formulation of questions	2	2	2	2
Description of the literature search	1	2	2	0
Referencing	1	2	2	2
Scientific reasoning	2	2	2	2
Appropriate presentation of data	2	2	2	2