Text and Data Mining valid from 2019-03-22
First Online: 22 March 2019
Compliance with Ethical Standards
: The author declares that she has no conflict of interest.
: 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.
: Informed consent was obtained from all individual participants included in the study.
: This article does not contain any studies with animals performed by any of the authors.