@article{Valkonen1997,
author = {Valkonen, T. and Van Poppel, F.},
title= {The contribution of smoking to sex differences in life expectancy},
year = {1997},
doi = {10.1093/eurpub/7.3.302},
journal = {The European Journal of Public Health},
volume = {7},
pages = {302--310},
}