Text and Data Mining valid from 2019-11-27
Accepted: 29 September 2019
First Online: 27 November 2019
Compliance with ethical standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of our institutional research committee (0105-17-SZMC) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.