<qa>  What is the minimum quantifiable limit for patients who have taken Divalproex- Patients who have taken Divalproex DR, Divalproex ER, or risperidone regularly over the 30 days prior to screeningwashout. If patients have taken divalproex either DR or ER at all in the 30 days prior to screeningwashout, a serum valproate level must be done at the time of screening and found to be below the minimum quantifiable limit. 