@article{ref1,
title="Urinary porphyrin pattern in lead poisoning",
journal="Deutsche Medizinische Wochenschrift",
year="1972",
author="Schmidt, D. and Stich, W.",
volume="97",
number="32",
pages="1176-1180",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-0472",
doi="10.1055/s-0028-1107524",
url="http://dx.doi.org/10.1055/s-0028-1107524"
}