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No effect of beta-carotene supplementation on risk of nonmelanoma skin cancer among men with low baseline plasma beta-carotene. |
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| Authors: | Debra A Schaumberg Uta M Frieling Nader Rifai Nancy Cook |
| Institution: | Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 900 Commonwealth Avenue East, Boston, MA 02215, USA. dschaumberg@rics.bwh.harvard.edu |
| Abstract: | |
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