Received: 29 April 2020
Accepted: 31 August 2020
First Online: 15 September 2020
Ethics approval and consent to participate
: This study was approved by the institutional ethics committee of Hospital Ceske Budejovice (LEC, reference number: 106/18). Consent for participation was not required due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.