Duijzer, G
Haveman-Nies, A
Jansen, S C
Beek, J ter
van Bruggen, R
Willink, M G J
Hiddink, G J
Feskens, E J M
Article History
Received: 30 November 2016
Revised: 3 March 2017
Accepted: 24 March 2017
First Online: 8 May 2017
Competing interests
: The authors declare no conflict of interest.