Text and Data Mining valid from 2019-12-01
Received: 10 August 2019
Accepted: 30 October 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: Ethical approval was waived because this study did not perform any intervention in humans and it did not use any personal data or biological samples of human origin. All collected data were completely anonymized. The informed consent obtained from study participants was written.
: Not applicable.
: The authors declare that they have no competing interests.