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. 2014 Jul 5;14:135. doi: 10.1186/1472-6920-14-135

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Copyright © 2014 Luttenberger 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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Changes in items asked before and after the course. Legend: Attention: For better visibility, the coding of items was reversed: 1 = Do not agree at all, 2 = Hardly agree, 3 = so/so, 4 = agree in part, 5 = Agree completely.