de Leeuw, Max http://orcid.org/0000-0003-0688-2393
Bohlken, Marc M
Mandl, René C W
Kahn, René S
Vink, Matthijs
Article History
Received: 11 November 2014
Revised: 19 December 2014
Accepted: 23 December 2014
First Online: 1 April 2015
Competing interests
: MdL, MMB, RCWM, RSK, and MV declare no conflict of interest.