Ignasiak, Zofia
Sebastjan, Anna http://orcid.org/0000-0001-6395-6147
Kaczorowska, Antonina
Skrzek, Anna
Article History
Received: 1 July 2019
Accepted: 6 December 2019
First Online: 1 January 2020
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: The study protocol was approved by the Ethics Committee for Scientific Research of the University of Physical Education in Wrocław, Poland (Feb 18, 2009).
: Informed consent was obtained from all individual participants included in the study.