Epirubicin for breast cancer may cause considerable venous sclerosis.

lecting data, conducting the analysis, and drafting the original article. All his coauthors helped to develop the study design, interpret the results, draft the manuscript, and revise the article for intellectual content. All authors have read and approved the final version. SGM is the guarantor. Funding: This project was supported by an operating grant from the Canadian Institutes of Health Research. SGM is supported by career awards from the Canadian Institutes of Health Research and the Michael Smith Foundation for Health Research. Competing interests: None declared. Ethical approval: The Behavioural Research Ethics Board at the University of British Columbia approved the analysis of databases in this study.