Text and Data Mining valid from 2019-08-14
First Online: 14 August 2019
Compliance with Ethical Standards
: The authors claim no conflict of interest.
: As the study involves human participants, all the ethical obligations were followed in this regard including the ethical standards of institutional/national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.