@article{ref1,
title="Making the grade",
journal="Nature",
year="2008",
author="Salzman, Hal and Lowell, Lindsay",
volume="453",
number="7191",
pages="28-30",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="10.1038/453028a",
url="http://dx.doi.org/10.1038/453028a"
}