We wish to retract the article titled “Recombinant Migration Inhibitory Factor Induces Nitric Oxide Synthase in Murine Macrophages” by Fernando Q. Cunha, Weishui Y. Weiser, John R. David, David W. Moss, Salvador Moncada, and F. Y. Liew, The Journal of Immunology, 1993, 150: 1908–1912.

On October 19, 1995, the Office of Research Integrity at the National Institutes of Health found that Weishu Y. Weiser, Ph.D., formerly of the Harvard Medical School at Brigham and Women’s Hospital, committed scientific misconduct by falsifying data in biomedical research supported by two Public Health Service grants. As a result, she agreed to submit a letter to The Journal of Immunology to retract this article. The offices of The Journal of Immunology have no record of receiving such a letter and hence the article is now being retracted.