@article{Xu2021,
author = {Xu, W. and Engelman, M. and Fletcher, J.},
title= {From convergence to divergence: Lifespan variation in US states, 1959–2017},
year = {2021},
doi = {10.1016/j.ssmph.2021.100987},
volume = {16},
number = {100987},
}