@article{ref1,
title="American medical society for sports medicine position statement: concussion in sport",
journal="Clinical journal of sport medicine",
year="2013",
author="Harmon, Kimberly G. and Drezner, Jonathan and Gammons, Matthew and Guskiewicz, Kevin M. and Halstead, Mark and Herring, Stan and Kutcher, Jeffrey S. and Pana, Andrea and Putukian, Margot and Roberts, William",
volume="23",
number="1",
pages="1-18",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1050-642X",
doi="10.1097/JSM.0b013e31827f5f93",
url="http://dx.doi.org/10.1097/JSM.0b013e31827f5f93"
}