Text and Data Mining valid from 2018-12-04
Received: 21 July 2018
Accepted: 1 December 2018
First Online: 4 December 2018
Compliance with ethical standards
: The authors declare that they have 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. Institutional ethical clearance was obtained before starting the study.
: 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.