Received: 5 December 2020
Accepted: 30 March 2021
First Online: 7 April 2021
: This study was approved by the Ethics Committee of the Clinical Centre Nis, Serbia (11744/2;5.05.2020). All procedures were in accordance with the latest version of the Declaration of Helsinki. Informed consent was obtained for all participants.
: Not applicable.
: The authors declare that they have no competing interests.