@article{ref1,
title="Basic epidemiology research designs I: cross-sectional design",
journal="International journal of injury control and safety promotion",
year="2019",
author="Bangdiwala, Shrikant I.",
volume="26",
number="1",
pages="124-126",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1745-7300",
doi="10.1080/17457300.2018.1556415",
url="http://dx.doi.org/10.1080/17457300.2018.1556415"
}