@article{ref1,
title="Serious recurrent injuries of athletes; contraindications to further competitive participation",
journal="New England journal of medicine",
year="1952",
author="Thorndike, A.",
volume="247",
number="15",
pages="554-556",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-4793",
doi="",
url="http://dx.doi.org/"
}