@article{ref1,
title="From sleep duration to mortality: implications of meta‐analysis and future directions",
journal="Journal of sleep research",
year="2009",
author="Grandner, Michael A. and Patel, Nirav P.",
volume="18",
number="2",
pages="145-147",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0962-1105",
doi="10.1111/j.1365-2869.2009.00753.x",
url="http://dx.doi.org/10.1111/j.1365-2869.2009.00753.x"
}