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. 2016 Nov 24;2016(11):CD004028. doi: 10.1002/14651858.CD004028.pub4
Clinical response: 11. Negative symptoms: 4c. mean endpoint score SANS subscale (skewed data)
Study Interventions Mean score SD N
Wassef 2000 Valproate ‐ mean SANS ‐ high = poor 2 3 5
Wassef 2000 Placebo ‐ mean SANS ‐ high = poor 16 18 7