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Kirsh VA, Mayne ST, Peters U, Chatterjee N, Leitzmann MF, Dixon LB, Urban DA, Crawford ED, Hayes RB.Kirsh VA, et al. Among authors: leitzmann mf.Cancer Epidemiol Biomarkers Prev. 2006 Jan;15(1):92-8. doi: 10.1158/1055-9965.EPI-05-0563.Cancer Epidemiol Biomarkers Prev. 2006.PMID: 16434593
Giovannucci E, Leitzmann M, Spiegelman D, Rimm EB, Colditz GA, Stampfer MJ, Willett WC.Giovannucci E, et al.Cancer Res. 1998 Nov 15;58(22):5117-22.Cancer Res. 1998.PMID: 9823321