@article{Liu2008,
author = {Liu, H. and Umberson, D.J.},
title= {The Times They Are a Changin': Marital Status and Health Differentials from 1972 to 2003},
year = {2008},
doi = {10.1177/002214650804900301},
journal = {Journal of Health and Social Behavior},
volume = {49},
number = {3},
pages = {239--253},
}