Table 2. Methodological quality assessment of the included systematic reviews.

Authors	1	2	3	4	5	6	7	8	9	10	11	Scoring
Kua et al. (2007)9	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	High(8)
Vernick et al. (1999)17	No	Yes	No	No	No	Yes	Yes	Yes	Yes	No	No	Medium (5)
Ker et al. (2005)10	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	No	High(9)
Roberts et al. (2008)6	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	High (11)
Korner-Bitensky et al. (2009)8	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	High (9)
Sangrar et al. (2019)14	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	High (11)
Martín-delosReyes et al (2019)7	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	No	No	High(8)

All 11-items were scored as “Yes”, “No”, “Can’t Answer” or “Not Applicable”. AMSTAR comprises the following items:

1. ‘a priori’ design provided;

2. Duplicate study selection/data extraction;

3. Comprehensive literature search;

4. Status of publication as inclusion criteria (i.e., grey or unpublished literature);

5. List of studies included/excluded provided;

6. Characteristics of included studies documented;

7. Scientific quality assessed and documented;

8. Appropriate formulation of conclusions (based on methodological rigor and scientific quality of the studies);

9. Appropriate methods of combining studies (homogeneity test, effect model used and sensitivity analysis);

10. Assessment of publication bias (graphic and/or statistical test); and

11. Conflict of interest statement.