Article History
Received: 22 October 2020
Revised: 15 February 2021
Accepted: 23 February 2021
First Online: 4 March 2021
Declarations
:
: For this type of retrospective study, no formal consent was required. All data were gathered and analyzed in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare no competing interests.