Serum concentrations of clozapine and its major metabolites: effects of cotreatment with Fluoxetine or Valproate. - Centorrino,F.; Baldasserini,R.J.; Kando,J.; Frankenburg,F.R.; Volpicelli,S.A.; Puopolo,P.R.; Flood,J. (Am J Psychiatry, 1994)