Funding for this research was provided by:
Śląski Uniwersytet Medyczny (KNW-2-005-N/7/K, KNW-1-034/K/7/O, KNW-2-015/N/8/K)
Article History
Received: 7 March 2019
Accepted: 16 May 2019
First Online: 6 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.