Trends in mortality among British doctors in relation to their smoking habits.

@article{Doll1972TrendsIM,
  title={Trends in mortality among British doctors in relation to their smoking habits.},
  author={Richard Doll and Malcolm C. Pike},
  journal={Journal of the Royal College of Physicians of London},
  year={1972},
  volume={6 2},
  pages={216-22}
}