To the Editor: The authors withdraw the article titled, “Correlation between DNA repair capacity in lymphocytes and acute side effects to skin during radiotherapy in nasopharyngeal cancer patients,” which appeared in the July 15, 2005, issue of Clinical Cancer Research (1). The first author reproduced sections without quotations or appropriate citation from the article titled, “Radiation-induced DNA damage and repair in lymphocytes from breast cancer patients and their correlation with acute skin reactions to radiotherapy” (O. Popanda, R. Ebberler, D. Twardella, et al. Int. J Radiat Oncol Biol Phys 2004 Apr 1; 55(5):1216–25; ref. 2). Although our research was on nasopharyngeal cancer rather than on breast cancer as published by the authors of the International Journal of Radiation Oncology*Biology*Physics article and contained some different data, reproducing the work of Popanda and co-authors and presenting it as our own, cause us to retract the article. The authors regret our actions and apologize to the scientific community and to Clinical Cancer Research for breaching scientific practices and editorial policies.

No potential conflicts of interest were disclosed.

1
Wang WD, Chen ZT, Li DZ, et al. Correlation between DNA repair capacity in lymphocytes and acute side effects to skin during radiotherapy in nasopharyngeal cancer patients.
Clin Cancer Res
2005
;
11
:
5140
–5.
2
Popanda O, Ebberler R, Twardella D, et al. Radiation-induced DNA damage and repair in lymphocytes from breast cancer patients and their correlation with acute skin reactions to radiotherapy.
Int J Radiat Oncol Biol Phys
2003
;
55
:
1216
–25.