Text and Data Mining valid from 2019-12-01
Received: 6 August 2019
Accepted: 15 November 2019
First Online: 20 December 2019
Ethics approval and consent to participate
: This research was approved by the Independent Ethics Committee of the Heinrich Heine University Düsseldorf, Germany (protocol no 4670)
: Was obtained using institutional consent forms.
: The authors declare that above mentioned interactions do not compete with the content of the present paper.