Steinberger, Bernhard http://orcid.org/0000-0002-3643-3049
Bredow, Eva http://orcid.org/0000-0002-7111-1838
Lebedev, Sergei http://orcid.org/0000-0003-0004-5009
Schaeffer, Andrew http://orcid.org/0000-0002-1286-5883
Torsvik, Trond H. http://orcid.org/0000-0002-3094-1405
Article History
Received: 9 July 2017
Accepted: 1 October 2018
First Online: 12 November 2018
Competing interests
: The authors declare no competing interests.