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Zhang, Xuehong, Kana Wu, Eunyoung Cho, Jing Ma, Andrew T. Chan, Xiang Gao, Walter C. Willett, Charles S. Fuchs, a Edward L. Giovannucci. Prospective Cohort Studies of Bowel Movement Frequency and Laxative Use and Colorectal Cancer Incidence in US Women and Men. 2013.

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