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| Methods | The same as for Graybill 1998a | |
| Participants | ||
| Interventions | ||
| Outcomes | ||
| Notes | ||
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Adequate sequence generation? | Unclear risk | Method of allocation sequence generation not specified |
| Allocation concealment? | High risk | "..open label.." |
| Blinding? All outcomes | Unclear risk | Third party blinded. |
