CONSORT subject flow diagram.

Subjects were placed initially in one of two groups, where one group was treated for 4 weeks with VPA before being measured, and the other group was measured directly as Controls. After the first measurement, the VPA treated group rested for 4 weeks with a washout period before being measured again Control. The subjects that first were Controls, were measured again after 4 weeks of VPA treatment. The subjects first treated with VPA were measured and then observed a 4 week washout and rest period before they were studied again as Controls. All subjects measured with VPA were combined for grouped analysis (same for Control measurements).