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Lumbar motoneurons numbers (mean ± SD) on E7.5 ipsilateral (LBR) and contralateral (CON) to LBR after daily treatment with trophic factors from E4 to E7. *p < 0.05; **p < 0.001 (vs saline LBR); ***p < 0.0025 (vs saline CON); ttests. See Materials and Methods and Results.
