@article{ref1,
title="Prevalence of self-reported head injury in the United States",
journal="New England journal of medicine",
year="2018",
author="Schneider, Andrea L. C. and Wang, Dan and Ling, Geoffrey and Gottesman, Rebecca F. and Selvin, Elizabeth",
volume="379",
number="12",
pages="1176-1178",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0028-4793",
doi="10.1056/NEJMc1808550",
url="http://dx.doi.org/10.1056/NEJMc1808550"
}