Received: 19 December 2019
Accepted: 12 July 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: Retrospective data evaluation was unnecessary for ethical approval in accordance with Hungarian law (235/2009 (X.20) Government Decree). A written informed consent to participate signed by each patient, parent or legal guardian.
: Informed consent was signed by each participant.
: The authors declare that the research was conducted in the absence of any commercial, financial or nonfinancial relationship that could be construed as a potential competing interest.