Carroll, A
Vogel, L C
Zebracki, K
Noonan, V K
Biering-Sørensen, F
Mulcahey, M J
Article History
Received: 21 October 2016
Revised: 29 December 2016
Accepted: 6 January 2017
First Online: 28 February 2017
Competing interests
: Dr VKN is an employee of Rick Hansen Institute. The remaining authors declare no conflict of interest.