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Khan SA, Sachdeva A, Naim S, Meguid MM, Marx W, Simon H, Halverson JD, Numann PJ.Khan SA, et al. Among authors: halverson jd.Cancer Epidemiol Biomarkers Prev. 1999 Oct;8(10):867-72.Cancer Epidemiol Biomarkers Prev. 1999.PMID: 10548314