Article History
Received: 5 December 2017
Accepted: 14 March 2018
First Online: 12 April 2018
Compliance with Ethical Standards
:
: None of the authors has a financial relationship with a commercial entity that has an interest in the subject of the presented manuscript or other conflicts of interest to disclose.
: 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 retrospective study was approved by the Vanderbilt University Institutional Review Board.
: Informed consent was not obtained from all individual participants included in the study as waiver of request for consent was obtained from the Vanderbilt University Institutional Review Board as this was a retrospective review study.