Niestrata-Ortiz, Magdalena http://orcid.org/0000-0002-5706-4561
Fichna, Piotr
Stankiewicz, Witold
Stopa, Marcin
Article History
Received: 1 August 2018
Revised: 2 February 2019
Accepted: 9 February 2019
First Online: 1 March 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: All subjects and in case of patients under the age of 18 years, all parents, have given informed consent. The study was approved by the Ethics Committee of the University of Medical Sciences in Poznań.