Table S2.
New results from repeated literature search on the 1st of April, 2014
| Total | After deduplication | |
|---|---|---|
| Embase | 691 | 687 |
| Medline OvidSP | 630 | 242 |
| Web-of-Science | 707 | 325 |
| PubMed publisher | 55 | 54 |
| Cochrane | 6 | 1 |
| Google Scholar | 200 | 159 |
| Total | 2289 | 1468 |
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