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| Question Type | Best Sources |
|---|---|
| Intervention | RCT and systematic reviews, cohort studies, case-control studies, case series |
| Diagnosis | RCT |
| Prognosis | Cohort studies, case-control studies, case series |
| Harm | RCT, cohort studies, case-control studies, case series |
| Assessing baseline risk | Cohort or cross-sectional design |
