Accepted: 29 December 2020
First Online: 17 January 2021
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This retrospective study involving human participants was 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. The Human Investigation Committee (IRB) approved this study.
: Participants have consented to the submission of the study series to the journal.