This study, Endometrial Cancer Incidence in Breast Cancer Patients Correlating with Age and Duration of Tamoxifen Use, by Chen et al., looks at the additional risk of endometrial cancer after tamoxifen treatment for female breast cancer patients, specifically in Taiwan. This is done by calculating the odds ratio of developing endometrial cancer for female breast cancer patients who have and have not used Tamoxifen. The authors look at the treatment’s effects on the cancer’s prevalence in order to better understand the overall health risks.