Article History
Received: 28 October 2018
Accepted: 14 August 2019
First Online: 26 August 2019
Compliance with ethical standards
:
: None of the authors have potential conflicts of interest to be disclosed.
: This study was approved by the institutional review board of a regional university hospital and patient consent was exempt due to the retrospective nature of the study (#2017-02-009). 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.
: This article does not contain any studies with animals performed by any of the authors.