Received: 17 June 2020
Accepted: 31 January 2021
First Online: 9 February 2021
Ethics approval and consent to participate
: The Ethical Committee and the Scientific Council of ‘’Onassis Cardiac Surgery Center’’ approved the study and granted access to the clinical/personal data in the study. The need for consent was waived due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.