The authors regret that the grant number and telephone number of the corresponding address were incorrect. The corrected acknowledgements and corresponding address appear below.
This work was supported in part by Small Business Innovation Research (SBIR) grant CA86649-01 from the National Institutes of Health to Y. Li.
Address correspondence to Dr. Yiwen Li, Department of Immunology, ImClone Systems Incorporated, 180 Varick St., New York, NY 10014. Phone: 646-638-5173; Fax: 212-645-2054; E-mail: email@example.com