Correction for vol. 51, p. 922

June 1997

There is an incorrect use of one of the references in the article by Ma et al. [Ma, J. F., G. Grant, and P. W. Melera. Mutations in the sixth transmembrane domain of P-glycoprotein that alter the pattern of cross-resistance also alter sensitivity to cyclosporin A reversal. Mol. Pharmacol. 51: 922–930 (1997)]. With the exception of its use on page 922, all citations of Ref. 1 should be replaced with a citation of Ref. 22.

The authors apologize for any confusion this error may have caused.

• The American Society for Pharmacology and Experimental Therapeutics