Funding for this research was provided by:
Text and Data Mining valid from 2019-02-01
Received: 5 July 2018
Revised: 30 December 2018
Accepted: 24 January 2019
First Online: 1 February 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practise at which the studies were conducted.