Text and Data Mining valid from 2020-05-05
Received: 16 September 2019
Revised: 7 April 2020
Accepted: 8 April 2020
First Online: 5 May 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest
: We certify that all applicable institutional and government regulations concerning the ethical use of human volunteers were followed during the course of this research. This work has been approved by the Ethics Committee and consent forms have been signed by all participants.