Funding for this research was provided by:
Polish Ministry of Science and Higher Education (Springer Open Choice)
Text and Data Mining valid from 2019-04-15
Received: 27 November 2018
Accepted: 1 April 2019
First Online: 15 April 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: The study protocol was approved by the local Ethical Committee at the Regional Medical Chamber in Cracow. All procedures performed in the study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individuals included in the study.