CMAP values by treatment arm – 6 month values and change from baseline.

1

 =  placebo group received matched placebo for both medications, L-carnitine and VPA.

2

 = active treatment group received both L-carnitine and VPA.

*Difference  = 0.121. Upper confidence level difference 0.568. Lower confidence level difference −0.328.

**Difference  = 0.570. Upper confidence level difference 1.465. Lower confidence level difference −0.326.