Text and Data Mining valid from 2019-02-12
Received: 21 January 2018
Accepted: 30 January 2019
First Online: 12 February 2019
Ethics approval and consent to participate
: This study was conducted after the approval of The Ethic Committee of The Clinical Centre of Serbia and in accordance with the Helsinki Declaration. The approval form is available in its original version from the corresponding author on request.
: Not applicable.
: The authors declare that they have no competing interests.
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