Received: 3 December 2017
Accepted: 24 January 2018
First Online: 14 February 2018
Ethics approval and consent to participate
: Approval was obtained from the University of Alabama at Birmingham Institutional Review Board (IRB-150910007) to conduct the current study. The need for consent was waived by the institutional review board from the University of Alabama at Birmingham.
: No individual patient data is presented in this study and thus consent to publish is not applicable.
: The authors declare that they have no competing interests.
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