Received: 11 August 2020
Accepted: 8 January 2021
First Online: 18 January 2021
Compliance with ethical standards
: All authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study was approved by the Bioethics Committee of the Medical University of A (approval number: 2019/02/01-02).
: Informed consent was not needed due to the retrospective design of the study.