1. American Cancer Society. Key Statistics for Bladder Cancer; available at http://go.nature.com/2gdfmey
2. The American College of Obstetricians and Gynecologists. Asymptomatic Microscopic Hematuria in Women; available at http://go.nature.com/2i6vqox
3. American Urological Association. Diagnosis, Evaluation and Follow-up of Asymptomatic Microhematuria (AMH) in Adults; available at http://go.nature.com/2xoyyb5
4. Lyratzopoulos, G., Neal, R. D., Barbiere, J. M., Rubin, G. P. & Abel, G. A. Lancet Oncol. 13, 353–365 (2012).
5. Women and Smoking: A Report of the Surgeon General (Department of Health and Human Services, 2001).