Received: 6 January 2021
Accepted: 4 August 2021
First Online: 26 August 2021
: The study protocol questionnaire and informed consent forms were reviewed and approved by the ethics committee of Riga Stradins University and by the Institutional Review Board of Children’s Clinical University Hospital (No. 6–1/07/35). In the case of minors, parental consent has been obtained.
: Not applicable.
: The authors have indicated they have no potential conflicts of interest to disclose.