@techreport{Hedegaard2021,
author = {Hedegaard, H. and Miniño, A.M. and Spencer, M.R. and Warner, M.},
title= {Drug overdose deaths in the United States, 1999–2020},
year = {2021},
doi = {10.15620/cdc:112340},
publisher = {National Center for Health Statistics (U.S.)},
address = {Hyattsville, MD},
institution = {NCHS data brief},
}