Funding for this research was provided by:
Uniwersytet Przyrodniczy w Poznaniu (This study was funded by the internal sources (statutory funds))
Ministerstwo Nauki i Szkolnictwa Wyższego (005/RID/2018/19 | Recipient)
Poznań University of Physical Education (Internal sources (statutory funds))
Text and Data Mining valid from 2019-09-05
Received: 10 June 2019
Accepted: 26 August 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: The study was approved by the Bioethics Committee at Poznan University of Medical Sciences (Poland) was granted for this study (decision No. 293/17 of 11 May 2017). In accordance with the Declaration of Helsinki, all participants signed an informed consent.
: Not applicable.
: The authors declare that they have no competing interests.