From the Applied Research Program, National Cancer Institute, Bethesda, Maryland. Address correspondence and reprint requests to: Joan L. Warren, PhD, Applied Research Program, National Cancer Institute, Executive Plaza North, Room 4005, 6130 Executive Blvd, MSC 7344, Bethesda, Maryland 20892-7344. E-mail: [email protected]
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Warren et al. (2003) studied this question.
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