@article{ref1,
title="Comfrey, a folk remedy not without harmful effects",
journal="Svenska läkartidningen",
year="1954",
author="Widmark, H.",
volume="51",
number="36",
pages="2255-2261",
abstract="<p>[Abstract unavailable]</p><p>Language: sv</p>",
language="sv",
issn="0371-439X",
doi="",
url="http://dx.doi.org/"
}