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Risk of bias in non-randomized studies of interventions (ROBINS-I).
| Unique ID | D1 | D2 | D3 | D4 | D5 | D6 | D7 | Overall |
|---|---|---|---|---|---|---|---|---|
| Iversen et al. |
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| Beissner et al. |
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| Khalil et al. |
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| Mailloux et al. |
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| Hicks et al. |
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: Critical; 
: Serious; 
: Moderate; 
: Low.
