@article{ref1,
title="A twin study of suicide",
journal="Acta geneticae medicae et gemellologiae",
year="1970",
author="Juel-Nielsen, N. and Videbech, T.",
volume="19",
number="1",
pages="307-310",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0001-5660",
doi="",
url="http://dx.doi.org/"
}