@article{ref1,
title="Vulvar carcinoma in situ in identical twins--an occupational hazard",
journal="Obstetrics and gynecology",
year="1972",
author="Friedrich, E. G.",
volume="39",
number="6",
pages="837-841",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0029-7844",
doi="",
url="http://dx.doi.org/"
}