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. 2014 Jul 14;14:33. doi: 10.1186/1472-6890-14-33

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Copyright © 2014 Krasowski et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Illustration of two-dimensional similarity to cortisol. The figure depicts chemical structures of cortisol, 6-methylprednisolone, 21-deoxycortisol, 17α-hydroxyprogesterone, boldenone, and mesterolone. Below each compound is the two-dimensional similarity to cortisol and the degree of cross-reactivity to the Roche Elecsys Cortisol immunoassay.