Received: 17 April 2018
Accepted: 9 August 2018
First Online: 23 August 2018
Ethics approval and consent to participate
: The current study was approved by the institutional review board of the University of Houston. All subjects completed informed consent prior to participation.
: Written informed consent was obtained from participants for use of audio tapes in the current study and for publication of their individual details and accompanying images in this manuscript. The consent forms are held by the authors and are available for review by the Editor-in-Chief.
: The authors declare that they have no competing interests.
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