Dyck, D Van
Cerin, E
De Bourdeaudhuij, I
Hinckson, E
Reis, R S
Davey, R
Sarmiento, O L
Mitas, J
Troelsen, J
MacFarlane, D
Salvo, D
Aguinaga-Ontoso, I
Owen, N
Cain, K L
Sallis, J F
Article History
Received: 15 April 2014
Accepted: 11 June 2014
First Online: 2 July 2014
Competing interests
: The authors declare no conflict of interest.