Text and Data Mining valid from 2018-11-29
Received: 20 June 2018
Accepted: 9 November 2018
First Online: 29 November 2018
Ethics approval and consent to participate
: The study was approved by the Bioethics Committee of the Medical University of Warsaw (No AKBE/187/2017).
: Not applicable.
: The authors declare that they have no competing interests.
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