Received: 22 August 2020
Accepted: 29 October 2020
First Online: 7 November 2020
Ethics approval and consent to participate
: The study complied with the Declaration of Helsinki and was performed according to the national law. The protocol has been approved by the local Ethical Committee (approval number: EK 29-273 ex 16/17).
: As this is a retrospective nonintervention study, the institutional review board waived the need for written informed consent from the participants.
: The authors declare that they have no competing interests.