@article{ref1,
title="Depression. U.S. Public Health Service",
journal="Journal of the American Academy of Nurse Practitioners",
year="1997",
author="",
volume="9",
number="9",
pages="431-435",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1041-2972",
doi="",
url="http://dx.doi.org/"
}