@article{ref1,
title="Letter: Iron-containing vitamin preparations",
journal="JAMA journal of the American Medical Association",
year="1974",
author="",
volume="230",
number="7",
pages="961-962",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}