Kobayashi 1991.
| Methods | Non‐random | |
| Participants | 11 | |
| Interventions | EC/IC bypass | |
| Outcomes | Any stroke during follow up, death or dependency | |
| Notes | — | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Allocation concealment? | Low risk | A ‐ Adequate |
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