Table 2. AMSTAR criteria.

AMSTAR, A Measurement Tool to Assess Systematic Reviews

AMSTAR Criteria	IA Cree et al., 2017 [33]	JD Merker et al., 2018 [34]	Ocana A et al., 2016 [35]
Priori design provided	YES	YES	YES
Duplicate study selection, data extraction present	YES	YES	YES
Comprehensive literature search performed	YES	YES	YES
Was the status of publication used as inclusion criteria	YES	YES	YES
A list of inclusion and exclusion studies provided	YES	NO	YES
Characteristics of inclusion studies provided	YES	YES	YES
Quality of inclusion studies included and documented	NO	NO	NO
Quality of inclusion studies used appropriately in forming conclusions	NO	NO	NO
Appropriate methods used to combine studies	YES	YES	YES
Likelihood of publication bias assessed	NO	YES	YES
Conflict of interest included	YES	YES	NO
The final score assigned	8/11	8/11	8/11