@article{Kravdal2011,
author = {Kravdal, H. and Syse, A.},
title= {Changes over time in the effect of marital status on cancer survival},
year = {2011},
doi = {10.1186/1471-2458-11-804},
journal = {BMC Public Health},
volume = {11},
number = {804},
pages = {1},
}