Cancer Letters is a journal providing rapid publication of brief articles in the broad area of cancer research. The journal places emphasis on the molecular and cell biology of cancer, oncogenes, carcinogenesis, radiation biology, molecular pathology, hormones and cancer, viral oncology, biology of cancer and metastasis, molecular cytogenetics, epidemiology; and experimental therapeutics. The primary criterion for publication is interest to a multidisciplinary audience. Papers should be brief but technically sound and substantiated by sufficient experimental detail. Clinical papers will be accepted if they contribute to the understanding of the basic mechanisms underlying disease. Papers published in Cancer Letters from January 2001 onwards will be divided into the following sections: Carcinogenesis & Cancer Prevention, Experimental Therapeutics, Epidemiology & Molecular Epidemiology, Molecular & Cell Biology, Tumour Biology. Authors are kindly requested to select the section where they wish their manuscript to appear when submitting their manuscript to the appropriate Editorial Office (please refer to the Guide for Authors for more information).