Frequency of cancer in 39,876 women taking and not taking aspirin.
Arguments
source
Cook, N.R., I. Lee, J.M. Gaziano, D. Gordon, P.M. Ridker, J.E.
Manson, C.H. Hennekens, and J.E. Buring. 2005. Low-dose aspirin in the
primary prevention of cancer. Journal of the American Medical
Association 294: 47-55.