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| Methods | RCT | |
| Participants | Abd. colorectal surgery | |
| Interventions | NGT | |
| Outcomes | Time to flatus nausea vomit | |
| Notes | table without specifying outliers 4 | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Allocation concealment? | Unclear risk | B ‐ Unclear |
