1. Cole SPC, Tannock IF (2005) Drug resistance. In: Tannock IF, Hill RP, Bristow RG, Harrington L (eds) The basic science of oncology. McGraw-Hill, New York, pp 376–399
2. Goldstein LJ, Galski H, Fojo A et al (1989) Expression of multidrug resistance gene in human cancers. J Natl Cancer Inst 81:116–124
3. Chan HS, Haddad G, Thorner PS et al (1991) P-glycoprotein expression as a predictor of the outcome of therapy for neuroblastoma. N Engl J Med 325:1608–1614
4. Lee CH (2004) Reversing agents for ATP-binding cassette (ABC) transporters: application in modulating multidrug resistance (MDR). Curr Med Chem Anticancer Agents 4:43–52
5. Wu C-P, Calcagno AM, Ambudkar SV (2008) Reversal of ABC drug transporter-mediated multidrug resistance in cancer cells: evaluation of current strategies. Curr Mol Pharmacol 1:93–105