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| Study | Reason for exclusion |
|---|---|
| Jensen 1994 | It is possible that this is the same cohort of participants reported by Anonymous in 1993 |
| Vajda 1985 | Only some participants had LGS but the results were not given independently for this group |
| Vassella 1978 | This paper is written in German, following translation the results remained unclear |
LGS: Lennox‐Gastaut syndrome.
