@article{King2018,
author = {King, D.E. and Xiang, J. and Pilkerton, C.S.},
title= {Multimorbidity trends in United States adults, 1988–2014},
year = {2018},
doi = {10.3122/jabfm.2018.04.180008},
volume = {31},
number = {4},
pages = {503--513},
}