Häcker, Irina
Harrell II, Robert A.
Eichner, Gerrit
Pilitt, Kristina L.
O’Brochta, David A.
Handler, Alfred M.
Schetelig, Marc F.
Article History
Received: 3 November 2016
Accepted: 30 January 2017
First Online: 7 March 2017
Competing interests
: The authors declare no competing financial interests.