@article{ref1,
title="Digitalis intoxication. A prospective clinical study with serum level correlations",
journal="New England journal of medicine",
year="1971",
author="Beller, G. A. and Smith, T. W. and Abelmann, W. H. and Haber, E. and Hood, W. B.",
volume="284",
number="18",
pages="989-997",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-4793",
doi="10.1056/NEJM197105062841801",
url="http://dx.doi.org/10.1056/NEJM197105062841801"
}