@article{ref1,
title="Psychoses in the offspring of schizophrenic monozygotic twins and their normal co-twins",
journal="British journal of psychiatry",
year="1971",
author="Fischer, M.",
volume="118",
number="542",
pages="43-52",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1250",
doi="",
url="http://dx.doi.org/"
}