@article{ref1,
title="A note on twin studies, schizophrenia and neurological impairment",
journal="Archives of general psychiatry",
year="1973",
author="Campion, E. and Tucker, G.",
volume="29",
number="4",
pages="460-464",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-990X",
doi="",
url="http://dx.doi.org/"
}