G Jamtvedt, R. D Herbert, S Flottorp, J Odgaard Jensen, K Havelsrud, A Barratt, E Mathieu, A Burls and A. D. Oxman
British Journal of Sports Medicine 44 ( 14 ): 1002 - 1009 , 2010
A Burls, J. I Emparanza, T Quinn and J. B. Cabello
Emergency Medicine Journal 27 ( 4 ): 283 - 286 , 2010