The International Breast Cancer Intervention Study (IBIS) is designed to evaluate the effect of taking daily tamoxifen on the incidence of breast cancer in women with an increased risk. Recruitment to the IBIS I trial closed in 2000. The IBIS II trial which is still recruiting, is divided into two parts. The prevention arm is looking at the use of Anastrozole and the DCIS arm is looking at Anastrozole versus Tamoxifen.
Details of IBIS I and IBIS II can be found at www.ibis-trials.org.
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