Document is current

Article History

First Online: 19 December 2018

Compliance with Ethical Standards

:

: 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.

: Informed consent was waived by the Institutional Review Board because analyses were conducted retrospectively on existing clinical data.

: The authors declare they have no conflicts of interest.