@article{ref1,
title="Physical activity improves mental health",
journal="Acta paediatrica",
year="2019",
author="Wasserman, Danuta",
volume="108",
number="6",
pages="984-985",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0803-5253",
doi="10.1111/apa.14772",
url="http://dx.doi.org/10.1111/apa.14772"
}