Table 4.

Identification and selection of studies. Domain 2: describe the procedures used to identify and choose studies (such as the number of reviewers involved): 02.

	Review 1	Review 2
2.1. Did a sufficient variety of databases and online sources been used in the search for both published and unpublished reports?	Y	Y
2.2. Were there any techniques employed in addition to database searches to find pertinent reports?	NI	N
2.3. Were the search criteria and structure likely to yield as many relevant studies as possible?	Y	Y
2.4. Were date, publishing format, or language restrictions appropriate?	N	N
2.5. Were measures made to reduce error in study selection?	Y	Y
Concerns about the research eligibility criteria’s specification	Low/High/Unclear
Rationale for concern	Low