Received: 26 March 2020
Accepted: 31 August 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: Written informed consent was obtained from all individuals included in the study and their parents or guardians on behalf of any participant under the age of 16. Additionally, retrospective studies from non-experimental data can be conducted in accordance with Polish national law (April, 30th 2010 regarding research institutes) to assess the efficacy and safety of treatment without specific consent, data can be reported to study coordinator in compliance with national law. Hence, explicit was not required in this instance, provided that only anonymous data is used in the publication (ref. the Polish legislation Dz.U. 1997 nr 28 poz. 152).
: Not applicable.
: The authors declare that they have no competing interests.