Delisle Nyström, C
Pomeroy, J
Henriksson, P
Forsum, E
Ortega, F B
Maddison, R
Migueles, J H
Löf, M
Article History
Received: 3 November 2016
Revised: 9 May 2017
Accepted: 12 June 2017
First Online: 26 July 2017
Competing interests
: The authors declare no conflict of interest.