In the article by Liao et al entitled “Inhibition of constitutively active forms of mutant kit by multitargeted indolinone tyrosine kinase inhibitors,” which appeared in the July 15, 2002, issue of Blood (Volume 100:585-593), under “Antibodies” in “Materials and methods” the fifth sentence should refer to “anti–phosphatidyl inositol 3-kinase.”