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Article History

Received: 7 January 2020

Accepted: 7 April 2020

First Online: 18 April 2020

Compliance of ethical standard

:

: The authors declare that they have no conflict of interest.

: 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.

: The institutional review board approved this retrospective study and informed consent was waived.