In the article by Urashima et al entitled “An oral CD40 ligand gene therapy against lymphoma using attenuated Salmonella typhimurium,” which appeared in the February 15, 2000, issue ofBlood (Volume 95:1258-1263), a correction should be noted. Under “Materials and methods, Salmonella strain and CD40L,” the name of the auxotrophic ST aroA strain donated by Dr Bruce A. D. Stocker and grown in 100 mL L broth should have been given as SL7207.