Received: 18 February 2019
Accepted: 19 March 2020
First Online: 24 April 2020
Ethics approval and consent to participate
: 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. This investigation was approved by the Institutional Ethical Committee (Medical Research Council (TUKEB), Budapest, Hungary (no.274/2013). This article does not contain any studies with animals performed by any of the authors.Participation in the study was voluntary and anonymous. All participants received written information in this regard and gave written informed consent for participation in the study.
: “Not applicable”.
: The authors declare that they have no competing interests.