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Title
Menstrual and reproductive factors and gastric cancer risk in a large prospective study of women.
Authors
Freedman, Neal D; Chow, Wong-Ho; Gao, Yu-Tang; Shu, Xiao-Ou; Ji, Bu-Tian; Yang, Gong; Lubin, Jay H; Li, Hong-Lan; Rothman, Nathaniel; Zheng, Wei; Abnet, Christian C
Abstract
Gastric cancer incidence rates are consistently lower in women than men in both high and low-risk regions worldwide. Sex hormones, such as progesterone and estrogen, may protect women against gastric cancer.