Kiers, D.
Koch, R. M.
Hamers, L.
Gerretsen, J.
Thijs, E. J. M.
van Ede, L.
Riksen, N. P.
Kox, M.
Pickkers, P.
Article History
Received: 4 August 2016
Accepted: 1 December 2016
First Online: 5 January 2017
Competing interests
: The authors declare no competing financial interests.