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Mayne,S.T., Cartmel,B., Baum,M. et al. (2001) Randomized trial of supplemental ß-carotene to prevent second head and neck cancer. Cancer Res., 61, 1457–1463. Remember we are NOT Doctors and have NO medical training. This site is like an Encylopedia - there are many pages, many links on many topics. Support our work with any size DONATION - see left side of any page - for how to donate. You can help raise awareness of CAM.