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Greifswald: Universitätsbibliothek Greifswald, 2015
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Freie Universität Berlin: Refubium (FU Berlin), 2014
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Wiley, 2011
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Springer Science and Business Media LLC, 2014
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Public Library of Science (PLoS), 2013
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Elsevier BV, 2011
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Hindawi Limited, 2013
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Elsevier BV, 2017
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SAGE Publications, 2017
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Ovid Technologies (Wolters Kluwer Health), 2016
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Elsevier BV, 2016
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SAGE Publications, 2016
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Springer Science and Business Media LLC, 2016
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American Thoracic Society, 2015
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Ovid Technologies (Wolters Kluwer Health), 2015
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Springer Science and Business Media LLC, 2014
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Public Library of Science (PLoS), 2014
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Wiley, 2013
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Ovid Technologies (Wolters Kluwer Health), 2012
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Wiley, 2012