Text and Data Mining valid from 2019-11-27
Received: 11 July 2019
Accepted: 11 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of the Department and was conducted in accordance with the 1975 Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.