Retraction: Sudbø J et al. DNA Content as a Prognostic Marker in Patients with Oral Leukoplakia. N Engl J Med 2001;344:1270-8 and Sudbø J et al. The Influence of Resection and Aneuploidy on Mortality in Oral Leukoplakia. N Engl J Med 2004;350:1405-13
Gregory D. Curfman, M.D., Stephen Morrissey, Ph.D., and Jeffrey M. Drazen, M.D.
Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.
On February 9, 2006, we published an Expression of Concern1about two articles we had published by Jon Sudbø et al.2,3In the Expression of Concern, we indicated that we were awaitingthe results of an investigation by Dr. Sudbø's institution.That investigation was undertaken by a commission appointedby the Rikshospitalet–Radiumhospitalet Medical Centerand the University of Oslo. The commission's report was filedon June 30, 2006, in Norwegian (http://www.rikshospitalet.no/content/res_bibl/6621.pdf),and we received an official English translation on September1, 2006 (see the Supplementary Appendix, available with thefull text of this article at www.nejm.org).
Retraction of
Sudbo et al., 
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