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Elsevier BV, 2020
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Hindawi Limited, 2020
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Medical University Prof. Dr. Paraskev Stoyanov - Varna, 2018
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Medical University Prof. Dr. Paraskev Stoyanov - Varna, 2018
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2015
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Ovid Technologies (Wolters Kluwer Health), 2015
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Wiley, 2014
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Springer Science and Business Media LLC, 2012
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Elsevier BV, 2005
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MDPI AG, 2022
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MDPI AG, 2024
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MDPI AG, 2023
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MDPI AG, 2023
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MDPI AG, 2022
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Medical University Prof. Dr. Paraskev Stoyanov - Varna, 2018
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Wiley, 2012
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Wiley, 2012
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Elsevier BV, 2007
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Wiley, 2006
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Springer Science and Business Media LLC, 2000