Jansen, B. H. E.
Oudshoorn, F. H. K.
Tijans, A. M.
Yska, M. J.
Lont, A. P.
Collette, E. R. P.
Nieuwenhuijzen, J. A.
Vis, A. N.
Article History
Received: 20 December 2017
Accepted: 5 April 2018
First Online: 21 April 2018
Compliance with ethical standards
: No support from any agency in the public, commercial, or not-for-profit sectors was received for this research. For this type of study, formal consent is not required.
: The authors declare that they have no conflicts of interest.