@article{doi:,
title = {NOnfatal traumatic brain injuries related to sports and recreation activities among persons aged ≤19 years—united states, 2001-2009},
journal = {JAMA},
volume = {306},
number = {21},
pages = {2318-2320},
year = {2011},
doi = {},
URL = { + http://dx.doi.org/},
eprint = {/data/Journals/JAMA/5002/jwr1207-1-1.pdf}
}