Received: 23 April 2020
Accepted: 9 June 2020
First Online: 15 June 2020
Ethics approval and consent to participate
: All procedures performed in this study 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. A written informed consent was obtained from all patients before all intervention procedures done in this study. This retrospective study was approved by our institutional review board. This article does not contain any studies with animals performed by any of the authors.
: Not applicable; retrospective study.
: The authors declare that they have no competing interests.