Received: 11 March 2021
Accepted: 28 September 2021
First Online: 5 October 2021
: The study complied with the requirements of the Declaration of Helsinki, national requirements for the conduct of retrospective studies and received approval from the University Hospital “Sveti Duh” Research Ethics Committee (protocol identifier 01–4212/13), and the Ethics Committee of Josip Juraj Strossmayer University of Osijek, Faculty of Medicine in Osijek, Croatia (protocol identifier 2158-61-07-19-63). All legal guardians of the participants signed informed consent.
: Not applicable.
: The authors declare that they have no competing interests.