Text and Data Mining valid from 2019-11-04
Received: 11 July 2019
Accepted: 4 October 2019
First Online: 4 November 2019
Ethics approval and consent to participate
: Prior to participation, written informed consent was obtained from all subjects, and study procedures were approved by the university’s Institutional Review Board and in compliance with the principles of the Declarations of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.