@article{ref1,
title="High suicide risk of the population awake at night",
journal="Fortschritte der Neurologie-Psychiatrie",
year="2021",
author="Klein, F.",
volume="89",
number="3",
pages="73-76",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0720-4299",
doi="10.1055/a-1163-9440",
url="http://dx.doi.org/10.1055/a-1163-9440"
}