Selenium and colorectal denoma: Results of a pooled analysis. - Jacobs,E.T.; Jiang,R.; Alberts,D.S.; Greenberg,E.R.; Gunter,E.W.; Karagas,M.R.; Lanza,E.; Ratnasinghe,L.; Reid,M.E.; Schatzkin,A.; Smith-Warner,S.A.; Wallace,K.; et al. (J Natl Cancer Inst, 2004)