Hagerty, Shannon B.
van Groenigen, Kees Jan
Allison, Steven D.
Hungate, Bruce A.
Schwartz, Egbert
Koch, George W.
Kolka, Randall K.
Dijkstra, Paul
Article History
Received: 28 February 2014
Accepted: 4 August 2014
First Online: 7 September 2014
Competing interests
: The authors declare no competing financial interests.