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| Methods | RCT n=42 | |
| Participants | CAF | |
| Interventions | GTN 0.2% ointment vs. GTN patch | |
| Outcomes | Healing Headache | |
| Notes | RNS ITT ‐ Pain not specified at entry | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | not specified |
| Allocation concealment (selection bias) | Unclear risk | D ‐ Not possible |
| Other bias | Low risk | ITT‐ |
| Duration of Follow‐up 6 months or more | High risk | 8 weeks |
