@article{Doll1981,
author = {Doll, R. and Peto, R.},
title= {The causes of cancer: Quantitative estimates of avoidable risks of cancer in the United States today},
year = {1981},
doi = {10.1093/jnci/66.6.1192},
volume = {66},
number = {6},
pages = {1191--1308},
}