- Clinical and biological effects of valproic acid as a histone deacetylase inhibitor on tumor and surrogate tissues: phase I/II trial of valproic acid and epirubicin/FEC. Munster, P., Marchion, D., Bicaku, E., Lacevic, M., Kim, J., Centeno, B., Daud, A., Neuger, A., Minton, S., Sullivan, D. Clin. Cancer Res. (2009)