@article{Elwert2008,
author = {Elwert, F. and Christakis, N.A.},
title= {The effect of widowhood on mortality by the causes of death of both spouses},
year = {2008},
doi = {10.2105/AJPH.2007.114348},
volume = {98},
number = {11},
pages = {2092--2098},
}