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Non randomised controlled studies quality assessment results
| Study | Baseline results reported? | Groups balanced at baseline? | Blinding of outcome assessment | Incomplete outcome data assessed? | Free from selective reporting? |
|---|---|---|---|---|---|
| Goodman 2007 | Y | Y | N | N | Y |
| King 2001 | Y | N | N | Y | Y |
| Kane 2004 | N | N | Y | N | Y |
| Vu 2007 | Y | N | N | Y | Y |
