@article{ref1,
title="Obstructive sleep apnea: a contagious disease?",
journal="Jornal Brasileiro de Pneumologia",
year="2006",
author="Martinez, D.",
volume="32",
number="2",
pages="ix-x",
abstract="<p>[Abstract unavailable]</p> <p>Language: pt</p>",
language="pt",
issn="1806-3713",
doi="",
url="http://dx.doi.org/"
}