Figures
Appendix 2.
Example of Search Strategy (MEDLINE via Ovid, 1946 to May 2014)
Figure.
Flowchart of the search process based on the PRISMA format.
Appendix 1.
Search Termsa
a Terms in each column were combined with OR. *=truncation; adjn=terms are near each other by n number.
Tables

Table 2.
Study Characteristics

Table 1.
Study Eligibility Criteria
Supplementary Data
eAppendix
Files in this Data Supplement:
- eAppendix (PDF) (18 KB) -
This PDF contains the following supplements:
- eAppendix. Quality Assessment Scores for All Included Studies