Text and Data Mining valid from 2019-11-21
Received: 12 February 2019
Revised: 29 August 2019
Accepted: 1 October 2019
First Online: 21 November 2019
Compliance with Ethical Standards
: Informed consent was obtained from all participants included in the study.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.