Received: 17 October 2019
Accepted: 6 July 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: This study was conducted according to the declaration of Helsinki and had ethical approval from University of Texas Institutional Review Board. All subjects gave written informed consent prior to data collection.
: Participants gave written informed consent to data treatment in this research study and permission to publish anonymous data and results.
: The authors declare that they have no competing interests.