Table 1.

Meta-Analysis Search Strategies

Database searched	Totals
Ovid MEDLINE(R) 1946 to December Week 1 2016; Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations January 10, 2017; Ovid MEDLINE(R) Epub Ahead of Print January 10, 2017	366
PsycINFO (EBSCOhost)	999
CINAHL with Full Text (EBSCOhost)	355
EMBASE (embase.com)	937
Cochrane Database of Systematic Reviews : Issue 1 of 12, January 2017 (Wiley)	3
Cochrane Central Register of Controlled Trials: Issue 11 of 12, November 2016 (Wiley)	258
Science Citation Index Expanded (SCI-EXPANDED) −-1900-present; Social Sciences Citation Index (SSCI) −-1900-present; Conference Proceedings Citation Index- Science (CPCI-S) −-1990-present; Conference Proceedings Citation Index- Social Science & Humanities (CPCI-SSH) −-1990-present (Web of Science)	378
Total	3,296
After de-duplication	2,657