Funding for this research was provided by:
Not applicable (Not applicable)
Text and Data Mining valid from 2018-07-07
Received: 6 March 2018
Accepted: 22 June 2018
First Online: 7 July 2018
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.