References:
1.Aspirin for the Prevention of Cardiovascular Disease, Topic Page. December 2009. U.S. Preventive Services Task Force. http://www.uspreventiveservicestaskforce.org/uspstf/uspsasmi.htm
2.Western States Stroke Consortium, Neurocritical Care and Stroke Division, University of Southern California, 1100 N. State St., Clinic Tower A4E111, Los Angeles, CA 90033
3.Bardia A, Ebbert JO, Vierkant RA, et al. Association of aspirin and nonaspirin nonsteroidal anti-inflammatory drugs with cancer incidence and mortality. J Natl Cancer Inst 2007 Jun 6;99 (11):881–9. http://www.ncbi.nlm.nih.gov/pubmed/17551148
4.Routine Aspirin or Nonsteroidal Anti-inflammatory Drugs for the Primary Prevention of Colorectal Cancer, Topic Page. March 2007. U.S. Preventive Services Task Force. http://www.uspreventiveservicestaskforce.org/uspstf/uspsasco.htm