@article{ref1,
title="Lead poisoning from contaminated opium",
journal="British medical journal: BMJ",
year="1973",
author="Chia, B. L. and Leng, C. K. and Hsii, F. P. and Yap, M. H. and Lee, Y. K.",
volume="1",
number="5849",
pages="354-354",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}