@article{Hoffman1996,
author = {Hoffman, C. and Rice, D. and Sung, HY.},
title= {Persons with chronic conditions: their prevalence and costs},
year = {1996},
doi = {10.1001/jama.1996.03540180029029},
journal = {JAMA},
volume = {276},
number = {18},
pages = {1473--1479},
}